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]: Chemistry has ____ less important names.\Question: Choose the right answer from options given a) ten b) no c) eight d) nine
[A]: b


[Q]: Ozone is a molecule containing ____ oxygen atoms.\Question: Choose the right answer from options given a) one b) nine c) no d) three
[A]: d


[Q]: Adult deer stand about ____ feet tall from the ground to shoulder.\Question: Choose the right answer from options given a) four b) seven c) nine d) three
[A]:
d