Mawsynram in the southern ranges of the________ receives the highest average rainfall in the world.

Correct option is B

The correct answer is (b) Khasi Hills
 Mawsynram, located in the southern ranges of the Khasi Hills in Meghalaya, India, receives the highest average rainfall in the world.
 It boasts an average annual rainfall of over 11,800 millimeters (467 inches), significantly higher than any other place on Earth.
 According to the Guinness Book of World Records, Mawsynram received 26,000 millimeters (1,000 in) of rainfall in 1985.
 Mawsynram lies in the funnel-shaped depression caused by the Khasi range in Meghalaya.
 The Bay of Bengal branch of monsoons is trapped in it and causes heavy rainfall.