The correct answer is: a) Khasi Hills
The Khasi Hills are a mountain range in the northeastern Indian state of Meghalaya. They are the wettest place on Earth, receiving an average annual rainfall of over 11,871 mm (467 in). The hills are home to a number of indigenous tribes, including the Khasi, Garo, and Jaintia peoples.
The Garo Hills are a mountain range in the northeastern Indian state of Meghalaya. They are located to the south of the Khasi Hills and are also home to a number of indigenous tribes. The Garo Hills receive an average annual rainfall of over 10,000 mm (39 in).
The Naga Hills are a mountain range in the northeastern Indian state of Nagaland. They are located to the north of the Khasi Hills and are home to a number of indigenous tribes. The Naga Hills receive an average annual rainfall of over 8,000 mm (31 in).
The Mikir Hills are a mountain range in the northeastern Indian state of Assam. They are located to the east of the Khasi Hills and are home to a number of indigenous tribes. The Mikir Hills receive an average annual rainfall of over 6,000 mm (23 in).