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').

Q: Calves are born ____ and a half months after mating.\Question: Choose the right answer from options given a) six b) ten c) eight d) two

A: c
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Q: Antibodies contain ____ pairs of protein chains.\Question: Choose the right answer from options given a) no b) two c) nine d) zero

A: b
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Q: Mynahs begin speaking at three to ____ months of age.\Question: Choose the right answer from options given a) four b) three c) ten d) six

A:
a
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