A popular hill station with a pleasant climate in Manipur is:

Tamenglong
Chandel
Ukhrul
Churachandpur

The correct answer is Ukhrul.

Ukhrul is a hill station in Manipur, India. It is located in the north-eastern part of the state, at an altitude of 1,800 meters (5,900 feet). The town is surrounded by hills and forests, and has a pleasant climate. Ukhrul is a popular tourist destination, and is known for its scenic beauty, temples, and festivals.

Tamenglong is a town in the Tamenglong district of Manipur, India. It is located at an altitude of 1,500 meters (4,900 feet) above sea level. Tamenglong is the headquarters of the Tamenglong district. The town is surrounded by hills and forests. Tamenglong is a popular tourist destination, and is known for its scenic beauty, temples, and festivals.

Chandel is a town in the Chandel district of Manipur, India. It is located at an altitude of 1,200 meters (3,900 feet) above sea level. Chandel is the headquarters of the Chandel district. The town is surrounded by hills and forests. Chandel is a popular tourist destination, and is known for its scenic beauty, temples, and festivals.

Churachandpur is a town in the Churachandpur district of Manipur, India. It is located at an altitude of 800 meters (2,600 feet) above sea level. Churachandpur is the headquarters of the Churachandpur district. The town is surrounded by hills and forests. Churachandpur is a popular tourist destination, and is known for its scenic beauty, temples, and festivals.