Which one of NTPC plants is not gasbased ?

Auraiya
Aonla
Dadri
Tanda

The correct answer is (d) Tanda.

NTPC Tanda is a coal-fired thermal power plant located in Tanda, Uttar Pradesh, India. It has an installed capacity of 2,100 MW. The plant was commissioned in 1992.

NTPC Auraiya is a coal-fired thermal power plant located in Auraiya, Uttar Pradesh, India. It has an installed capacity of 1,980 MW. The plant was commissioned in 2000.

NTPC Aonla is a coal-fired thermal power plant located in Aonla, Uttar Pradesh, India. It has an installed capacity of 1,320 MW. The plant was commissioned in 1998.

NTPC Dadri is a gas-fired power plant located in Dadri, Uttar Pradesh, India. It has an installed capacity of 1,320 MW. The plant was commissioned in 2004.