The district headquarters of West Sikkim is located in:

The correct answer is: a) Ravangla

Ravangla is the district headquarters of West Sikkim district in the Indian state of Sikkim. It is located at an altitude of 2,130 metres (6,990 ft) above sea level. The town is surrounded by mountains and forests. Ravangla is a popular tourist destination. It is known for its beautiful scenery, temples, monasteries, and wildlife sanctuaries.

The other options are incorrect because:

• Namchi is a town in South Sikkim district.
• Geyzing is a town in East Sikkim district.
• Pelling is a town in West Sikkim district.