Q: You are presented with the quiz "How can cells of the Tobacco Mosaic be seen?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "viruses are so small that they can be seen only with an electron microscope" and "viruses include the Tobacco Mosaic Virus". So, what's the best answer to the question?

Options: i. refraction of light. ii. an area swollen with pus. iii. by indirect light. iv. death and devastation. v. bending light rays. vi. electron microscope. vii. deadly and devastating. viii. Veins and arteries..
The answer is:
vi.