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]: Butterflies have ____ stages in their life cycle.\Question: Choose the right answer from options given a) two b) four c) no d) eight
[EX A]: b

[EX Q]: Guinea has ____ territories or colonies.\Question: Choose the right answer from options given a) no b) seven c) three d) eight
[EX A]: a

[EX Q]: Cancer strikes one in three people and kills ____ in four.\Question: Choose the right answer from options given a) one b) eight c) two d) zero
[EX A]:
a