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]: Facial features are smooth and very ____ dimensional.\Question: Choose the right answer from options given a) zero b) four c) ten d) three
[A]: d


[Q]: Meteorologists rely mainly on ____ types of satellites.\Question: Choose the right answer from options given a) four b) two c) ten d) three
[A]: b


[Q]: Photons do have ____ rest mass.\Question: Choose the right answer from options given a) four b) no c) zero d) two
[A]:
c