Which one of the following gases released from bio-gas plant is used as a fuel gas

Of the following, which one is non-contractual earning

The teeth lacking in Herbivorous animals is:

Govind Ballabh Pant Sagar reservoir is situated in :

Element that is not found in blood is :

The Kailasanatha Temple (Siva Temple) at Kanchipuram containing sculptures with paintings in the inner wall, was built by