The organ most damaged by heavy consumption of alcohol is :

Which one of the following ideologies has class-struggle as a part of its doctrine?

Which one of the following is the community from which the President of India can nominate two members to Lok Sabha?

A test used for determining the biological quality of drinking water is :

Which one of the following is not a structural component of a plant?

Which one among the following radioactive substances has maximum half-life period?