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]: Many aneurysms have ____ symptoms until they burst.\Question: Choose the right answer from options given a) no b) five c) six d) seven
[A]: a


[Q]: Hypertension affects nearly one in ____ adults.\Question: Choose the right answer from options given a) three b) seven c) five d) zero
[A]: a


[Q]: Calves are born ____ and a half months after mating.\Question: Choose the right answer from options given a) six b) ten c) eight d) two
[A]:
c