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]: Stable oxygen has eight protons and ____ neutrons.\Question: Choose the right answer from options given a) eight b) ten c) three d) zero
[A]: a


[Q]: Rain is uncommon except during the rainy season which lasts about ____ weeks during the summer.\Question: Choose the right answer from options given a) seven b) six c) no d) eight
[A]:
b