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:
Females have two X-chromosomes, ____ from each parent.\Question: Choose the right answer from options given a) ten b) four c) one d) zero

Ex Output:
c


Ex Input:
Hydra has ____ distinct methods of reproduction, asexual and sexual.\Question: Choose the right answer from options given a) two b) zero c) no d) ten

Ex Output:
a


Ex Input:
Light intensity is measured under ____ sets of conditions.\Question: Choose the right answer from options given a) no b) four c) two d) five

Ex Output:

c