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]: Chemical interactions are essentially electron interactions of ____ atoms.\Question: Choose the right answer from options given a) six b) no c) ten d) two
[A]: d


[Q]: Some people recover their sense of smell spontaneously, for ____ obvious reason.\Question: Choose the right answer from options given a) no b) two c) four d) nine
[A]:
a