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]: Most people recover in one to ____ months.\Question: Choose the right answer from options given a) no b) three c) seven d) eight
[A]: b


[Q]: Carbon forms ____ bonds.\Question: Choose the right answer from options given a) five b) four c) two d) three
[A]: b


[Q]: Laughter first appears around three to ____ months in response to active stimuli.\Question: Choose the right answer from options given a) seven b) zero c) eight d) four
[A]:
d