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]: Female elephants have babies about ____ years apart, and they have only one each time.\Question: Choose the right answer from options given a) eight b) one c) zero d) three
[A]: d


[Q]: Cooked meat freezes well for up to ____ months.\Question: Choose the right answer from options given a) four b) three c) eight d) five
[A]: b


[Q]: Cyclic neutropenia tends to occur every three weeks and last three to ____ days at a time.\Question: Choose the right answer from options given a) no b) six c) ten d) four
[A]:
b