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:
Fruit trees are usually safe after ____ years.\Question: Choose the right answer from options given a) five b) four c) no d) three

Ex Output:
d


Ex Input:
Sexual maturity occurs at three to four years for females and ____ to five years for males.\Question: Choose the right answer from options given a) nine b) seven c) five d) four

Ex Output:
d


Ex Input:
Steam distillation refers to the distillation of ____ immiscible liquids.\Question: Choose the right answer from options given a) nine b) two c) ten d) eight

Ex Output:

b