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').

Example Input: Young squirrels remain in the nest for about ____ weeks.\Question: Choose the right answer from options given a) seven b) six c) two d) eight
Example Output: b

Example Input: Pluralism Comes in ____ forms.\Question: Choose the right answer from options given a) ten b) four c) six d) two
Example Output: d

Example Input: Boys generate ____ times more androgen than girls do, and are more likely to develop acne.\Question: Choose the right answer from options given a) ten b) five c) one d) three
Example Output:
a