The correct answer is D. Diesel Locomotive Works, Varanasi.
The Ministry of Railways is the ministry of the Government of India responsible for the planning, operation, and maintenance of India’s railway system. The ministry is headed by the Minister of Railways, who is a member of the Union Cabinet.
The ministry has a number of subordinate offices, including the Railway Board, the Railway Safety Directorate, and the Railway Audit and Accounts Department. The ministry also has a number of public sector undertakings (PSUs), including the Indian Railways, the Indian Railway Catering and Tourism Corporation, and the Container Corporation of India.
The Diesel Locomotive Works, Varanasi is a PSU under the Ministry of Heavy Industries and Public Enterprises. It is a major manufacturer of diesel locomotives for the Indian Railways.
The other options are all PSUs under the Ministry of Railways.
- Container Corporation of India Limited (Concor) is a leading provider of integrated logistics solutions in India. It is the largest container handling company in the country and operates a network of over 100 inland container depots and terminals.
- Konkan Railway Corporation Limited (KRCL) is a public sector undertaking that operates the Konkan Railway, a 765 km long railway line that runs along the western coast of India.
- Indian Railways Construction Company Limited (IRCON) is a public sector undertaking that undertakes construction and maintenance of railway infrastructure. It is one of the largest railway construction companies in the world.