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:
Alleles segregate independently yielding ____ possible allelic combinations in gametes.\Question: Choose the right answer from options given a) ten b) one c) four d) nine

Ex Output:
c


Ex Input:
Mountain goats have ____ sharp horns.\Question: Choose the right answer from options given a) two b) six c) ten d) four

Ex Output:
a


Ex Input:
House sparrows can rear ____ broods in a season.\Question: Choose the right answer from options given a) no b) one c) three d) eight

Ex Output:

c