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:
Baby elephants are usually dependent on mother s milk for at least ____ years.\Question: Choose the right answer from options given a) six b) three c) two d) seven

Ex Output:
b


Ex Input:
Cats have ____ lives.\Question: Choose the right answer from options given a) five b) one c) two d) nine

Ex Output:
d


Ex Input:
Nonyl phenols are quite toxic, slow to biodegrade, and have ____ business in any cleaning product.\Question: Choose the right answer from options given a) zero b) four c) nine d) no

Ex Output:

d