Gametangial copulation $(conjugation)$ is common in

Sac fungi are included in ..........

$A$: Nutritional mutant strain of pink mould is auxotroph.
$R$: It is not able to prepare its own metabolites from the raw materials obtained from outside.

Which is the correct group for Basidiomycetes?

Who is responsible for wheat rust?

In which form is the stored food reserved in fungi?