Which of the following organisms exhibits saprophytic nutrition?

Match Column-$I$ with Column-$II$ and select the correct option:

Column-$I$ (Classes of fungi)	Column-$II$ (Common name)
$A$. Phycomycetes	$I$. Sac fungi
$B$. Ascomycetes	$II$. Algal fungi
$C$. Basidiomycetes	$III$. Fungi imperfecti
$D$. Deuteromycetes	$IV$. Club fungi

Select the correct statements regarding fungi:
$I$ - They are heterotrophic organisms.
$II$ - They show a great diversity in morphology and habitat.
$III$ - White rust in mustard is caused by parasitic fungi.
$IV$ - Bread mold (Rhizopus) causes the white cottony growth on bread.
$V$ - Yeast is used to make bread and beer.
$VI$ - They prefer to grow in warm and humid places.

Who is responsible for wheat rust?

$A$ dikaryotic cell has

The plant body of which organism is called a mycelium?