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: Nymphs feed and mature through ____ instars in about six to eight weeks.\Question: Choose the right answer from options given a) four b) eight c) five d) no

A: c
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Q: Living cells have at least ____ parts.\Question: Choose the right answer from options given a) seven b) three c) zero d) four

A: b
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Q: Roses have ____ petals.\Question: Choose the right answer from options given a) five b) two c) four d) no

A:
a
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