The correct answer is: A. Sitamarhi
Janki temple is situated in Sitamarhi district of Bihar, India. It is a Hindu temple dedicated to the goddess Sita. The temple is located on the banks of the river Son. It is one of the most popular pilgrimage sites in Bihar.
The temple was built in the 11th century by the king of Mithila, Laxman Sen. The temple is a fine example of Nagara architecture. The temple complex has a number of shrines, including the main shrine of Sita, the shrines of Rama, Lakshmana, Hanuman, and other deities.
The temple is open to visitors all year round. However, the best time to visit the temple is during the month of Chaitra (March-April), when the annual Ram Navami festival is celebrated.
The other options are incorrect because:
- B. West Champaran is a district in Bihar, India. It is not the district where Janki temple is situated.
- C. East Champaran is a district in Bihar, India. It is not the district where Janki temple is situated.
- D. Siwan is a district in Bihar, India. It is not the district where Janki temple is situated.