Protein coat of a virus enclosing nucleic acid is called -----------

Explanation

Option B is correct since the 'capsid' is the protein shell that encloses the nucleic acid. Moreover, the capsid proteins also help the virus attach and penetrate the host cells thereby infecting the host.Option A is incorrect because a 'vector' is a living organism that transmits an infectious agent from an infected animal to a human or another animal.Option C is incorrect because a 'plasmid' is a small, circular, double-stranded DNA molecule found in bacteria.Option D is incorrect because the 'viral genome' is the complete genetic complement contained in a DNA or RNA molecule in a virus.