The second largest city in Manipur is:

Thoubal
Bishnupur
Senapati
Moirang

The correct answer is Thoubal.

Thoubal is a town in Manipur, India. It is the second largest city in the state after Imphal. Thoubal is located on the banks of the Thoubal River, about 15 kilometers from Imphal. The town is known for its temples, including the Shri Govindajee Temple and the Shri Irengbam Leikai Temple. Thoubal is also home to the Manipur University.

Bishnupur is a town in Manipur, India. It is located about 30 kilometers from Imphal. Bishnupur is known for its temples, including the Kangla Fort and the Emar Palace. The town is also home to the Bishnupur Handloom Weavers Cooperative Society.

Senapati is a town in Manipur, India. It is located about 50 kilometers from Imphal. Senapati is the headquarters of Senapati district. The town is known for its scenic beauty and its traditional culture.

Moirang is a town in Manipur, India. It is located about 40 kilometers from Imphal. Moirang is known for its historical significance. The town is the site of the Battle of Moirang, which was fought in 1891. Moirang is also home to the Moirang War Museum.