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:
Illiteracy is ____ percent higher among women than men.\Question: Choose the right answer from options given a) seven b) six c) zero d) five

Ex Output:
a


Ex Input:
All mass spectrometers consist of ____ distinct regions.\Question: Choose the right answer from options given a) three b) one c) two d) zero

Ex Output:
a


Ex Input:
Plaice reach maturity typically when they are between four and ____ years old.\Question: Choose the right answer from options given a) three b) seven c) six d) no

Ex Output:

c