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]: Smallmouth bass grow to ____ inches in their first growing season.\Question: Choose the right answer from options given a) five b) four c) seven d) ten
[A]: a


[Q]: Microwave ovens emit ____ kinds of radiation.\Question: Choose the right answer from options given a) six b) two c) four d) eight
[A]: b


[Q]: Bimolecular steps involve the collision of ____ reacting molecules.\Question: Choose the right answer from options given a) three b) zero c) six d) two
[A]:
d