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: Ozone is a naturally occurring molecule containing ____ atoms of oxygen.\Question: Choose the right answer from options given a) three b) five c) nine d) eight

A: a
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Q: Ants have ____ distinct body parts.\Question: Choose the right answer from options given a) nine b) zero c) no d) three

A: d
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Q: Ultraviolet radiation comes from sunlight, which contains ____ forms of radiation.\Question: Choose the right answer from options given a) three b) five c) ten d) six

A:
a
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