Viruses are often confused with living things. This is because Viruses are composed of proteins and genetic material; they maintain
homeostasis
Viruses are composed of proteins and genetic material; they possess the ability
to produce proteins
O Viruses are composed of proteins and genetic material; they possess a
metabolism and ability to produce proteins
Viruses are composed of proteins and genetic material; and may be classified
(sorted) by their amino acid sequences

*

Explanation:

A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

the answers are a and c