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').
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Question: Some motors contain ____ gears and spin very fast, and have little if any torque.\Question: Choose the right answer from options given a) four b) three c) five d) no

Answer: d


Question: Vaccination typically occurs at ____ to eight weeks of age in kittens.\Question: Choose the right answer from options given a) three b) nine c) six d) no

Answer: c


Question: Heart attacks cause some tissue death within four minutes and brain death within ____ minutes.\Question: Choose the right answer from options given a) three b) eight c) ten d) one

Answer:
b