Who discovered $TMV$ (Tobacco Mosaic Virus)?

The protein coat of a virus is known as:

What are the algal components of a lichen called?

Assertion: Lichen is important for chemical industries.
Reason: Litmus and Orcein are formed from lichens.

Which of the following statements is false regarding viroids?

Choose the correct option for the following statements:
$(i)$ The name virus,meaning venom or poisonous fluid,was given by $Pasteur / D. J. Ivanowsky$.
$(ii)$ $W. M. Stanley / T. O. Diener$ discovered viroids.