Which of the following reproduces only inside a host cell

Which of the following reproduces only inside a host cell?

  1. Bacteria
  2. Virus
  3. Amoeba
  4. Fungus

Answer

Virus is a micro organism, which is in an inactive or deal form outside the body of a host.

It reproduces or replicates only when it enters a host and reaches its cells.

The correct option is B.