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').

[EX Q]: Nymphs emerge in ____ to seven days and flatten themselves against the leaf to feed.\Question: Choose the right answer from options given a) one b) five c) nine d) two
[EX A]: b

[EX Q]: Most viruses have only ____ organelles.\Question: Choose the right answer from options given a) ten b) two c) four d) eight
[EX A]: b

[EX Q]: Sponges have ____ cell types.\Question: Choose the right answer from options given a) no b) nine c) three d) five
[EX A]:
c