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:
Most people recover in one to ____ months.\Question: Choose the right answer from options given a) no b) three c) seven d) eight

Ex Output:
b


Ex Input:
Most linguists organize the African languages into ____ major language families.\Question: Choose the right answer from options given a) three b) four c) eight d) no

Ex Output:
b


Ex Input:
Today there are more than ____ million known chemicals.\Question: Choose the right answer from options given a) eight b) nine c) ten d) three

Ex Output:

a