The bacteriophage which infects colon bacterium is:

Assertion $(A)$: The capsid of a virus is made up of many small subunits called capsomeres.
Reason $(R)$: Viruses exhibit active and living behavior in a virus-free state.

Caulimo viruses $(Cauliflower\, mosaic\, virus)$ are a group of viruses which have:

The symbiotic association of fungi and algae is called

Assertion $A$: Viroids and viruses can pass through bacteria-proof filters.
Reason $R$: Bacteria are retained by bacteria-proof filters.
Which option is correct for Assertion $A$ and Reason $R$?

Which of the following is $NOT$ true for lichens?