Why can cyclones during retreating monsoon be serious for the eastern coast?

Correct answer: They form in Bay of Bengal and can bring strong winds and rain to the coast

The direct answer is option B: cyclones form in the Bay of Bengal and can bring strong winds and rain to the eastern coast. During the retreating monsoon, the Bay of Bengal remains warm and contains much moisture. Warm ocean water and suitable atmospheric conditions can help low-pressure systems strengthen into cyclones. These systems may move toward the east coast and produce destructive winds, heavy rain, storm surges and flooding. Option A is wrong because the Thar Desert is not the normal source of these coastal Bay of Bengal cyclones. Option B is correct because it gives both the source region and the danger. Option C is wrong because such cyclones do not simply end only in the Himalayas; their paths and effects vary. Option D is wrong because loo is a hot, dry land wind, not the mechanism that forms tropical cyclones over warm seas. Exam cue: retreating monsoon plus warm Bay of Bengal means eastern-coast cyclone risk.