Which word set completes the following analogy?

knife : cut : :

a. dentist : teeth

b. hammer : nail

c. slice : strike

d. chop : axe

A knife cuts just as an axe chops.
Although dentist and teeth are related, a dentist does not teeth, teeth is not a verb.
Slice and strike are both verbs, so you can eliminate that.
A hammer doesn't really nail, they are both nouns. 
So the answer is, I believe, D. chop : axe.

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