Consider the following statements w.r.t. viruses and state true (T) and false (F):

(a) Viruses can multiply only when they are inside the living cells.

(b) Virus cannot pass through bacterial proof filter.

(c) Viruses that infect animals have either single- or double-stranded DNA or single-stranded RNA.

(d) Viruses cause diseases such as mumps, smallpox, herpes, citrus canker, and tobacco mosaic disease.