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: Most aphthous ulcers heal in one to ____ weeks.\Question: Choose the right answer from options given a) two b) eight c) one d) seven

A: a
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Q: Selenium is ____ times more poisonous than arsenic.\Question: Choose the right answer from options given a) one b) five c) eight d) two

A: b
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Q: Most women have ____ problems getting pregnant with a retroverted uterus.\Question: Choose the right answer from options given a) one b) eight c) no d) five

A:
c
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