What is the best replacement for the underlined word in the sentence below?

Question

Unlike toxic sea serpents, there is no known antivenin that can save those bitten by a blue-ringed octopus.
a.
effect
c.
antitoxin
b.
measurement
d.
doctor

Answer 1

The best replacement for the underlined word "antivenin" in the sentence is:

c. antitoxin

An antitoxin is a substance that can neutralize a toxin, which is consistent with the context of the sentence discussing protection against venomous bites.