The correct answer is: South West Khasi Hills.
South West Khasi Hills is a district in the state of Meghalaya in north-eastern India. It is the second-largest district in Meghalaya, after East Garo Hills. The district has a population of 232,622 (2011 census), and a population density of 18 people per square kilometre. The district headquarters is at Sohra (Cherrapunji).
The district is located in the Western Ghats mountain range. The main rivers in the district are the Umngot River, the Kynshi River, and the Myntdu River. The district is covered in forests, and the main forest types are tropical moist deciduous forest and tropical evergreen forest.
The main economic activities in the district are agriculture, forestry, and tourism. The main crops grown in the district are rice, maize, and potatoes. The main forest products are timber, bamboo, and cane. The main tourist attractions in the district are the Mawsynram waterfalls, the Nohkalikai Falls, and the Living Root Bridges.
The other options are incorrect because they have a higher population density than South West Khasi Hills.
- South Garo Hills has a population of 344,466 (2011 census), and a population density of 102 people per square kilometre.
- West Khasi Hills has a population of 333,489 (2011 census), and a population density of 113 people per square kilometre.
- East Khasi Hills has a population of 619,423 (2011 census), and a population density of 265 people per square kilometre.