The correct answer is C. 1953.
Tilaiya Dam is a gravity dam on the Barakar River in the Indian state of Jharkhand. It is located about 100 km from Ranchi, the state capital. The dam was constructed between 1953 and 1961 and is the second largest dam in Jharkhand after Maithon Dam. The dam is 263 m high and has a reservoir capacity of 1,200 million cubic meters. The dam is used for irrigation, power generation, and flood control.
Option A is incorrect because the Tilaiya Dam was not completed in 1948. The dam was constructed between 1953 and 1961.
Option B is incorrect because the Tilaiya Dam was not completed in 1949. The dam was constructed between 1953 and 1961.
Option D is incorrect because the Tilaiya Dam was not completed in 1961. The dam was constructed between 1953 and 1961.