What are the fungal components of lichens called?

What is a bacteriophage known as?

What is $Strigula$?

Given below is the diagram of a bacteriophage. In which one of the options are all the four parts $A, B, C$ and $D$ correctly identified?

Assertion $A$: Bacteriophages are bacteria-eating viruses.
Reason $R$: Bacterial viruses are obligate parasites in bacterial cells.
Which option is correct for Assertion $A$ and Reason $R$?

$RNA$ is the genetic material in: