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:
Mosquitoes spend one to ____ days in the pupae stage.\Question: Choose the right answer from options given a) zero b) two c) five d) three

Ex Output:
b


Ex Input:
Statistics show that within ____ years of divorce, many people marry a second time.\Question: Choose the right answer from options given a) four b) nine c) six d) three

Ex Output:
d


Ex Input:
Women are the sole breadwinners in one household in ____ worldwide.\Question: Choose the right answer from options given a) no b) three c) zero d) nine

Ex Output:

b