Ancient Scientists — Set 1

Correct Answer: B. Brahmagupta

• **Brahmagupta** = Brahmagupta was the first to give systematic rules for computing with zero. • **Brahmasphutasiddhanta** — This is the title of his text where he formally described rules for zero. • 💡 Wrong-option analysis: Varahamihira: Known for astronomy and astrology, not for defining zero; Aryabhata: Made significant contributions to mathematics and astronomy, including a place-value system, but Brahmagupta formalized operations with zero; Bhaskara II: A later mathematician known for 'Lilavati', also worked with zero but after Brahmagupta.

Correct Answer: D. Surgery

• **Surgery** = The 'Sushruta Samhita' is a foundational text primarily focused on surgery. • **over 300** — The text describes over 300 surgical procedures, highlighting its extensive coverage. • 💡 Wrong-option analysis: Pediatrics: Deals with child health, which is not the primary focus of Sushruta Samhita; Internal Medicine: Focuses on non-surgical treatment of internal diseases, distinct from surgery; Toxicology: The study of poisons, not the main subject of Sushruta Samhita.

Correct Answer: B. Aryabhata

• **Aryabhata** = Aryabhata proposed that the Earth rotates on its axis, causing day and night, and gave a scientific explanation for eclipses. • **Aryabhatiya** — This is his major work covering mathematics and astronomy, where these ideas are documented. • 💡 Wrong-option analysis: Lalla: A later astronomer, known for 'Sishyadhivriddhida-tantra', who built on Aryabhata's work; Mahavira: A Jain mathematician known for 'Ganita Sara Sangraha', not for astronomical theories about Earth's motion; Varahamihira: An astronomer and astrologer known for 'Pancha Siddhantika', who synthesized existing knowledge rather than proposing a heliocentric model.

Correct Answer: D. Ayurveda

• **Ayurveda** = The 'Charaka Samhita' is a foundational text of the ancient Indian system of medicine known as Ayurveda. • **three doshas** — The text focuses on the three doshas: Vata, Pitta, and Kapha, central to Ayurvedic philosophy. • 💡 Wrong-option analysis: Homeopathy: A system of alternative medicine developed in Germany in the late 18th century; Unani: A traditional system of medicine originating in ancient Greece and developed in the Islamic world; Siddha: An ancient traditional system of medicine originating in South India, distinct from Ayurveda's classical texts.

Correct Answer: D. Kanada

• **Kanada** = Acharya Kanada is credited with proposing the atomic theory of the universe, suggesting matter is composed of 'Anu' or atoms. • **Vaisheshika** — He founded the Vaisheshika school of philosophy, which elaborated on his atomic theory. • 💡 Wrong-option analysis: Kapila: Founder of the Samkhya school of philosophy, known for cosmology but not atomic theory; Patanjali: Compiler of the Yoga Sutras, focusing on yoga philosophy and practice; Gautama: Founder of the Nyaya school of philosophy, known for logic and epistemology, distinct from atomic theory.

Correct Answer: C. Bhaskara II

• **Bhaskara II** = The ancient mathematical text 'Lilavati', dealing with arithmetic and geometry, was written by Bhaskara II. • **Siddhanta Shiromani** — 'Lilavati' is the first part of his major work, the 'Siddhanta Shiromani'. • 💡 Wrong-option analysis: Baudhayana: Authored the 'Sulba Sutras', known for geometric rules; Varahamihira: Primarily an astronomer and astrologer, known for 'Pancha Siddhantika'; Aryabhata: Author of 'Aryabhatiya', covering mathematics and astronomy, but not 'Lilavati'.

Correct Answer: A. Varahamihira

• **Varahamihira** = Varahamihira wrote the 'Pancha Siddhantika', a summary of five ancient astronomical systems. • **Ujjain** — Varahamihira lived in Ujjain, an important ancient center for astronomy. • 💡 Wrong-option analysis: Brahmagupta: Known for 'Brahmasphutasiddhanta' and contributions to mathematics; Bhaskara I: Known for his commentary on Aryabhata's work and approximation of sine; Aryabhata: Author of 'Aryabhatiya', which presented an original astronomical system, not a summary of five systems.

Correct Answer: D. Baudhayana

• **Baudhayana** = Baudhayana primarily authored the 'Sulba Sutras', which contained ancient geometric rules for constructing fire altars. • **Pythagorean Theorem** — Baudhayana provided the earliest known statement of what is now called the Pythagorean Theorem. • 💡 Wrong-option analysis: Aryabhata: Known for 'Aryabhatiya' covering astronomy and mathematics; Pingala: Author of 'Chhandas Shastra', known for binary numeral system; Lagadha: Author of 'Vedanga Jyotisha', the earliest known text on Indian astronomy.

Correct Answer: A. Pingala

• **Pingala** = Pingala authored the 'Chhandas Shastra', which contains the earliest known description of a binary numeral system. • **Meru Prastara** — His work also contains the basic idea behind Pascal's triangle, known in India as Meru Prastara. • 💡 Wrong-option analysis: Kapila: Founder of the Samkhya school of philosophy, not associated with binary systems or prosody; Kanada: Credited with the atomic theory and founder of the Vaisheshika school, not 'Chhandas Shastra'; Panini: Author of 'Ashtadhyayi', a foundational text on Sanskrit grammar, not 'Chhandas Shastra'.

Correct Answer: A. Aryabhata

• **Aryabhata** = Aryabhata is credited with providing a very accurate value of Pi (π) as 3.1416. • **3.1416** — This highly accurate value for Pi was calculated by Aryabhata. • 💡 Wrong-option analysis: Varahamihira: Primarily an astronomer and astrologer, not known for calculating Pi with this precision; Mahavira: A Jain mathematician known for contributions to fractions and permutations; Bhaskara I: Known for his work on indeterminate equations and a rational approximation of the sine function, not primarily for this Pi value.