The correct option is B retreating monsoon season
The months of October and November are known for retreating monsoon season. During this season, the monsoon trough of low pressure turns weaker and is progressively replaced by high pressure. This results in the withdrawal of monsoon. The outreach of the monsoons begins to turn weak. Their influence over the Indian landmass begins in wither. By the outset of October, they recede from the Northern Plains.