Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Ex Input:
Calves are born ____ and a half months after mating.\Question: Choose the right answer from options given a) six b) ten c) eight d) two

Ex Output:
c


Ex Input:
Clover leaves with ____ to nine leaflets, illustrating a tendency to mutate.\Question: Choose the right answer from options given a) three b) zero c) ten d) five

Ex Output:
a


Ex Input:
Blue crabs have ____ pairs of walking legs and paddle-shaped rear swimming legs.\Question: Choose the right answer from options given a) no b) two c) three d) six

Ex Output:

c