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:
Songbirds have ____ sets of vocal chords.\Question: Choose the right answer from options given a) six b) two c) eight d) ten

Ex Output:
b


Ex Input:
Baboons can travel up to ____ miles a day.\Question: Choose the right answer from options given a) seven b) three c) two d) six

Ex Output:
d


Ex Input:
Tasmanian devils live ____ to eight years.\Question: Choose the right answer from options given a) five b) four c) no d) eight

Ex Output:

a