Mawsynram, located in Meghalaya, holds the record for the:

Highest average annual rainfall in the world
Lowest average annual rainfall in the world
Most rainy days in a year
Highest humidity levels

The correct answer is: a) Highest average annual rainfall in the world.

Mawsynram is a village in the East Khasi Hills district of Meghalaya, India. It is located about 100 km from Shillong, the state capital. Mawsynram is known as the wettest place on Earth, with an average annual rainfall of 11,871 mm (467.4 in). The village receives most of its rainfall from the southwest monsoon, which brings heavy rains from June to September.

The other options are incorrect because:

  • b) Lowest average annual rainfall in the world. The driest place on Earth is the Atacama Desert in Chile, with an average annual rainfall of 15 mm (0.6 in).
  • c) Most rainy days in a year. Mawsynram does not hold the record for the most rainy days in a year. This record is held by Lloro, Colombia, which receives an average of 285 rainy days per year.
  • d) Highest humidity levels. The highest humidity levels on Earth are found in Cherrapunji, India, which has an average humidity level of 80%.