The correct answer is A. Indian Railway.
Indian Railways is the largest national enterprise of India. It is the world’s fourth-largest railway network, with 121,000 kilometers (75,000 mi) of track and 7,349 stations. It carries over 23 million passengers and 1.2 million tons of freight daily.
Indian Railways was founded in 1853, and it has played a major role in the development of India. It has helped to connect different parts of the country, and it has also helped to promote economic growth.
Indian Railways is a public sector undertaking, and it is governed by the Ministry of Railways. It is divided into 17 zones, and each zone is headed by a general manager.
Indian Railways is a major employer in India, and it provides employment to over 1.3 million people. It is also a major contributor to the Indian economy, and it generates over 1% of the country’s GDP.
Indian Railways has been facing a number of challenges in recent years, including financial problems, safety issues, and corruption. However, it remains a vital part of the Indian economy, and it is expected to continue to play a major role in the development of the country.
The other options are incorrect because they are not national enterprises of India. Indian Shipyard is a public sector undertaking, but it is not a national enterprise. Airways and Waterways are not national enterprises either.