1. River valley region
2. Arid region
3. Karst region
4. Glacier region
Option “3” is correct. The Blind valley is found in the karst region. Karst topography is a geological formation shaped by the dissolution of a layer or layers of soluble bedrock, usually carbonate rock such as limestone or dolomite, but also in gypsum.
152. During volcanic eruption deposition of lava in anticlines and synclines of folded mountains accounts for formation of-
1. Phacolith
2. Lopolith
3. Batholith
4. Lacolith
Option “1” is correct. During volcanic eruption deposition of lava in anticlines and synclines of folded mountains accounts for formation of phacolith.
153. Which one of the following is a warm ocean current?
1. East Australian current
2. West Australian current
3. Benguela current
4. Peru current
Option “1” is correct. East Australian current is a warm ocean current that moves warm water from the tropical Coral Sea, where it splits from the South Equatorial Current, down the east coast of Australia.
154. U-shaped valley develops in-
1. Karst region
2. Glacial region
3. Desert region
4. All of these
Option “2” is correct. U-shaped valley develops in the Glacial region. Ice causes friction on the sides of the valley.
155. Which of the following land forms is not formed by wind action?
1. Stone Lattice
2. Mushroom or Gara
3. Sand Bars
4. Inselberg
Option “3” is correct. Sand Bars is not formed by wind action. A long mass or low ridge of submerged or partially exposed sand built up in the water along a shore or beach by the action of waves or currents.
156. Coral reef extending along with eastern coast of Australia is-
Option “2” is correct. Coral reef, the Great Barrier Reef extending along with eastern coast of Australia.
157. What is the International Date Line?
1. It is the equator
2. It is the 0° longitude
3. It is the 90° east longitude
4. It is the 180° longitude
Option “4” is correct. The IDL is roughly based on the meridian of 180° longitude, roughly down the middle of the Pacific Ocean, and halfway around the world from the Greenwich meridian.
158. 49th Parallel is the boundary line between which two countries?
1. USA and Canada
2. North and South Vietnam
3. Germany and France
4. Brazil and Chile
Option “1” is correct. 49th Parallel is the boundary line between United States of India and Canada.
159. How does La-Nina affect the Pacific Ocean?
1. Decreases salinity of ocean
2. Cools downs the temperature of water
3. Maintains stable temperature of water
4. Increases salinity of ocean
Option “2” is correct. During a period of La Nina, the sea surface temperature across the equatorial Eastern Central Pacific Ocean will be lower than normal by 3 to 5 °C. Thus it cools downs the temperature of water.
160. Which of the following country is not a member of SAARC?
1. Nepal
2. Maldives
3. China
4. Afghanistan
Option “3” is correct. The South Asian Association for Regional Cooperation (SAARC) is the regional intergovernmental organization and geopolitical union of nations in South Asia. Its member states include Afghanistan, Bangladesh, Bhutan, India, Nepal, the Maldives, Pakistan and Sri Lanka.
