Outer covering of virus made up of protein is A. capsid B. coat C. virion D. viriod

The correct answer is A. capsid.

A capsid is the protein shell of a virus. It is made up of subunits called capsomeres, which are arranged in a specific way to form a geometric shape. The capsid protects the virus’s genetic material and helps it to attach to and infect host cells.

A coat is a layer of protein or glycoprotein that surrounds the capsid of some viruses. The coat helps the virus to attach to and infect host cells.

A virion is a complete virus particle, consisting of a capsid and its genetic material.

A viroid is a non-cellular infectious agent that consists of a single molecule of RNA. It does not have a capsid or a coat.