The correct option is Western Rajasthan.
Explanation
The withdrawal of the Southwest Monsoon marks the end of the rainy season in India. This process is driven by the southward migration of the sun, which leads to the cooling of the North Indian landmass and the southward shift of the Inter-Tropical Convergence Zone (ITCZ). Consequently, the low-pressure trough over the Ganga plains weakens and is replaced by high-pressure systems, causing the winds to reverse.
Regional Analysis:
- The withdrawal of the monsoon is a gradual process that proceeds from the northwest to the southeast.
- It commences first in the extreme northwestern parts of the country. Specifically, the withdrawal begins in Western Rajasthan around September 1.
- After withdrawing from Rajasthan, it retreats from the adjacent regions of Punjab and Haryana.
- By mid-October, the monsoon withdraws completely from the northern half of the Indian Peninsula.
- The withdrawal from the Southern Peninsula happens much later, typically merging with the onset of the Northeast Monsoon rains.
Key Takeaway:
While the Southwest Monsoon advances from the south (Kerala) towards the north, its withdrawal follows the reverse trajectory, starting from the northwest (Western Rajasthan) and proceeding towards the south.