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]: Teething begins for most babies around ____ to six months.\Question: Choose the right answer from options given a) three b) four c) five d) seven
[A]: b

[Q]: Some European countries require ____ years of education.\Question: Choose the right answer from options given a) no b) nine c) six d) three
[A]: d

[Q]: Imago is a group of ____ young musicians whose love for music is full of passion.\Question: Choose the right answer from options given a) four b) seven c) two d) no
[A]:
a