Viruses that infect bacteria are termed as

Read the following statements carefully and identify correct statements $w.r.t.$ Lichens:
$a.$ The association cannot tolerate air pollution,especially due to sulphur dioxide.
$b.$ Lichens are annuals and their growth is slow.
$c.$ The fungal partner mostly belongs to Ascomycetes.
$d.$ Soredia are most efficient means of asexual reproduction.
$e.$ Orchids seldom occur without this association.
$f.$ Foliose lichens are pioneers of succession in a water body.

Which method of reproduction occurs in lichens?

Which of the following is primarily classified as a nucleoprotein in the context of biological classification of infectious agents?

$A.$ Viroids are the pathogens responsible for Parkinson's disease in humans.
$R.$ Viroids are smaller in size than viruses.

Which is correct $w.r.t.$ lichens?