Around September, with the sun fast retreating south, the northern land mass of the Indian subcontinent begins to cool off rapidly. With this air pressure beings to build over northern India, the Indian Ocean and its surrounding atmosphere still holds its heat. This causes cold wind to sweep down from the Himalayas and Indo-Gangetic Plain towards the vast spans of the Indian Ocean south of the Deccan peninsula. This is known as the Northeast Monsoon or Retreating Monsoon.

Correct Option: C

Around September, with the sun fast retreating south, the northern land mass of the Indian subcontinent begins to cool off rapidly. With this air pressure beings to build over northern India, the Indian Ocean and its surrounding atmosphere still holds its heat. This causes cold wind to sweep down from the Himalayas and Indo-Gangetic Plain towards the vast spans of the Indian Ocean south of the Deccan peninsula. This is known as the Northeast Monsoon or Retreating Monsoon.

During the hot weather period i.e. from March to May the eastern and North-eastern states of the subcountinent like West Bengal, Bihar, Assam, Odisha (parts) and Bangladesh experience dramatic appearance of a special type of violent thunderstorm known as Nor' wester. In Bengal it is known as 'Kal Baisakhi' or calamity of the month of Baisakh (April, 15-May, 15). Apart from its destructive effects like sudden rise in wind speed, lightning, thunder and hail the rainfall associated with the storm although small in amount, is extremely helpful for the pre-Kharif crops like jute, Aus paddy, summer till and a large number of vegetables and fruits and the sudden drop in temperature gives relief after unbearable mid-day heat.

Correct Option: B

During the hot weather period i.e. from March to May the eastern and North-eastern states of the subcountinent like West Bengal, Bihar, Assam, Odisha (parts) and Bangladesh experience dramatic appearance of a special type of violent thunderstorm known as Nor' wester. In Bengal it is known as 'Kal Baisakhi' or calamity of the month of Baisakh (April, 15-May, 15). Apart from its destructive effects like sudden rise in wind speed, lightning, thunder and hail the rainfall associated with the storm although small in amount, is extremely helpful for the pre-Kharif crops like jute, Aus paddy, summer till and a large number of vegetables and fruits and the sudden drop in temperature gives relief after unbearable mid-day heat.

Project Tiger was launched by Kailash Sankhala in India in 1973. The project aims at ensuring a viable population of Bengal Tigers in their natural habitats and also to protect them from extinction.

Correct Option: A

Project Tiger was launched by Kailash Sankhala in India in 1973. The project aims at ensuring a viable population of Bengal Tigers in their natural habitats and also to protect them from extinction.

The Western Ghats or the Sahyadri constitute a mountain range along the western side of India. It is a UNESCO World Heritage Site and is one of the eight "hottest hotspots" of biological diversity in the world.

Correct Option: C

The Western Ghats or the Sahyadri constitute a mountain range along the western side of India. It is a UNESCO World Heritage Site and is one of the eight "hottest hotspots" of biological diversity in the world.