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]: All butterflies go through ____ distinct stages in their lives.\Question: Choose the right answer from options given a) eight b) seven c) four d) three
[EX A]: c

[EX Q]: Human malaria is caused by ____ species of Plasmodium . .\Question: Choose the right answer from options given a) six b) ten c) seven d) four
[EX A]: d

[EX Q]: Most men take ____ to two pills per day.\Question: Choose the right answer from options given a) nine b) seven c) one d) zero
[EX A]:
c