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:
Pairs encodes all sets of objects with ____ components.\Question: Choose the right answer from options given a) ten b) five c) two d) no

Ex Output:
c


Ex Input:
Molecules are ____ or more atoms stuck together.\Question: Choose the right answer from options given a) two b) zero c) six d) eight

Ex Output:
a


Ex Input:
Most deer develop their largest antlers between the ages of ____ and six years.\Question: Choose the right answer from options given a) zero b) three c) seven d) four

Ex Output:

d