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

Answer: a


Question: Ants have ____ distinct body parts.\Question: Choose the right answer from options given a) nine b) zero c) no d) three

Answer: d


Question: Psychiatrists say one in ____ people are mentally ill.\Question: Choose the right answer from options given a) four b) one c) ten d) three

Answer:
a