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:
Pistillate flowers have a compound ovary with ____ locules topped by three sticky, sessile stigmas.\Question: Choose the right answer from options given a) zero b) three c) six d) seven

Ex Output:
b


Ex Input:
Children of alcoholics are ____ times more likely than other people to become alcoholics themselves.\Question: Choose the right answer from options given a) zero b) four c) nine d) two

Ex Output:
b


Ex Input:
Most plants do have ____ direction symmetry because they are unable to move around.\Question: Choose the right answer from options given a) two b) five c) nine d) four

Ex Output:

d