Question

incognito most nearly means
a useless.
b confused.
c undercover.
d contradictory.

Explanation:

"Incognito" means to be in disguise or hidden from recognition, which is similar to "undercover". "Useless" means having no use, "confused" means being perplexed, and "contradictory" means being in conflict. None of these are as close in meaning to "incognito" as "undercover".

Answer:

C. undercover