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').
--------
Question: Most people recover in one to ____ months.\Question: Choose the right answer from options given a) no b) three c) seven d) eight

Answer: b


Question: Natural chlorine contains ____ isotopes.\Question: Choose the right answer from options given a) two b) six c) eight d) seven

Answer: a


Question: Most mothers give birth to one young an average of every ____ to six years in the wild.\Question: Choose the right answer from options given a) two b) eight c) zero d) five

Answer:
d