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').

Input: Consider Input: Many scientists believe the neutrino has ____ mass at all.\Question: Choose the right answer from options given a) eight b) zero c) two d) no

Output: d


Input: Consider Input: Most women notice their breasts become fuller and firmer within the first six to ____ weeks.\Question: Choose the right answer from options given a) four b) eight c) zero d) ten

Output: b


Input: Consider Input: Most phone numbers are eight digits with the exception of mobile numbers, which are ____ digits.\Question: Choose the right answer from options given a) ten b) seven c) three d) nine


Output: a