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]: Millipedes have ____ pairs of legs on each body segment.\Question: Choose the right answer from options given a) seven b) ten c) six d) two
[EX A]: d

[EX Q]: Organisms have ____ forms of nucleic acid.\Question: Choose the right answer from options given a) four b) three c) two d) one
[EX A]: c

[EX Q]: Cities have various sizes, and can contain from one to ____ armies depending on size.\Question: Choose the right answer from options given a) eight b) four c) seven d) three
[EX A]:
b