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]: Echinoderms usually have ____ appendages, but there are some exceptions.\Question: Choose the right answer from options given a) ten b) five c) seven d) three
[A]: b


[Q]: Elk retain their antlers for more than ____ months of the year.\Question: Choose the right answer from options given a) nine b) ten c) six d) seven
[A]: c


[Q]: Dalmatians can take two to ____ years to mature mentally.\Question: Choose the right answer from options given a) eight b) five c) three d) no
[A]:
c