Launched World’s first Bio Toilet Train. Named as:

The correct answer is: A. Deen Dayalu Express

The Deen Dayalu Express is a long-distance train service operated by Indian Railways. It is named after former Prime Minister of India, Atal Bihari Vajpayee. The train was launched in 2015 and runs between New Delhi and Kanpur Central. It is the first train in India to have bio toilets. Bio toilets are a type of toilet that uses bacteria to break down human waste. This process produces methane gas, which can be used to generate electricity. Bio toilets are more environmentally friendly than traditional toilets, as they do not require water or sewerage systems.

The other options are incorrect because:

• The Himsagar Jan Shatabdi Express is a train service that runs between New Delhi and Kolkata. It was launched in 1995 and is not equipped with bio toilets.
• The Dirubharg Rajdhani Express is a train service that runs between New Delhi and Ranchi. It was launched in 2002 and is not equipped with bio toilets.
• The Shatabdi Express is a train service that runs between New Delhi and Agra. It was launched in 1988 and is not equipped with bio toilets.