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:
Springtails reproduce quickly usually within three to ____ weeks.\Question: Choose the right answer from options given a) five b) six c) nine d) three

Ex Output:
a


Ex Input:
Most toddlers find it hard to sit still for more than a few seconds, let alone ____ minutes.\Question: Choose the right answer from options given a) no b) three c) four d) zero

Ex Output:
b


Ex Input:
Radiologists miss about ____ in five breast cancers.\Question: Choose the right answer from options given a) seven b) ten c) one d) zero

Ex Output:

c