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]: Women account for more than ____ out of five deaths from stroke.\Question: Choose the right answer from options given a) three b) six c) eight d) nine
[EX A]: a

[EX Q]: Pairs encodes all sets of objects with ____ components.\Question: Choose the right answer from options given a) ten b) five c) two d) no
[EX A]: c

[EX Q]: Perception has ____ levels of complexity.\Question: Choose the right answer from options given a) no b) two c) ten d) three
[EX A]:
d