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 Q]: Motor neurons are divided into ____ groups.\Question: Choose the right answer from options given a) two b) six c) seven d) eight
[EX A]: a

[EX Q]: Sexual reproduction involves ____ individual organisms.\Question: Choose the right answer from options given a) six b) no c) two d) nine
[EX A]: c

[EX Q]: Age of onset is after ____ months of age.\Question: Choose the right answer from options given a) seven b) two c) three d) zero
[EX A]:
c