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:
Genetic mapping divides the chromosomes in ____ bands.\Question: Choose the right answer from options given a) ten b) two c) four d) nine

Ex Output:
b


Ex Input:
Sports bras come in ____ basic styles.\Question: Choose the right answer from options given a) five b) six c) two d) zero

Ex Output:
c


Ex Input:
Baby gorillas stay with their moms until they're ____ years old.\Question: Choose the right answer from options given a) eight b) seven c) three d) one

Ex Output:

c