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: Ossification begins up to ____ months before birth.\Question: Choose the right answer from options given a) nine b) seven c) three d) six

A: b
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Q: Diploid cultivars have ____ alleles.\Question: Choose the right answer from options given a) eight b) six c) two d) five

A: c
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Q: Whole numbers are the natural numbers , but whole numbers always include ____ .\Question: Choose the right answer from options given a) four b) zero c) five d) eight

A:
b
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