A famous hill station and popular tourist destination in Mizoram is:

The correct answer is: a) Champhai.

Champhai is a town and a district in the state of Mizoram, India. It is the headquarters of the Champhai district. The town is located in the southern part of the state, on the border with Myanmar. Champhai is a popular tourist destination, known for its beautiful scenery, including hills, forests, and rivers. The town is also home to a number of historical and cultural sites, including the Champhai Palace, the Champhai Museum, and the Champhai Baptist Church.

The other options are incorrect because:

• b) Thenzawl is the headquarters of the Serchhip district.
• c) Reiek is a town in the Champhai district.
• d) Lunglei is the headquarters of the Lunglei district.