Nor Westers are dreaded evening thunderstorms seen in ____________.

Correct option is A

The correct answer is (a) Bengal and Assam.
 Nor'westers, locally known as "Kalbaishakhi," are violent thunderstorms that occur in the late afternoon or evening during the pre-monsoon season, particularly in the months of March to May.
 These storms are common in the eastern parts of India, especially in the states of West Bengal and Assam. They bring sudden heavy rainfall, strong winds, and sometimes hail, causing damage to crops, property, and sometimes even loss of life.
 The Nor'westers are crucial for the tea and jute industries in these regions, as the rainfall helps in the growth of these crops.