The correct option is C September
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
The monsoon winds blow from June to September. After September, due to the apparent motion of the sun towards the Southern Hemisphere, the low-pressure zone in the Indian subcontinent withdraws gradually. The pressure difference that caused the monsoon winds to enter the Indian subcontinent weakens and disappears.