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]: Ants have ____ noses.\Question: Choose the right answer from options given a) zero b) eight c) five d) three
[EX A]: c

[EX Q]: Traditional neon electrifies the inert gas from ____ directions.\Question: Choose the right answer from options given a) two b) nine c) one d) six
[EX A]: a

[EX Q]: Cyclic neutropenia tends to occur every ____ weeks and last three to six days at a time.\Question: Choose the right answer from options given a) ten b) eight c) one d) three
[EX A]:
d