Correct Option: B

Indian Railways (reporting mark IR) is an Indian state-owned enterprise, owned and operated by the government of India through the Ministry of Railways. It is one of the world’s largest railway networks comprising 115,000 km (71,000 mi) of track over a route of 65,000 km (40,000 mi) and 7,500 stations. IR carries about 7,500 million passengers annually or more than 20 million passengers daily (more than a half of which are suburban passengers) and 2.8 million tons of freight daily.