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').

Q: Islamic practice is based on what are called the ____ pillars of faith.\Question: Choose the right answer from options given a) eight b) one c) five d) four

A: c
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Q: Neutrinos are particles with almost ____ mass and no electric charge.\Question: Choose the right answer from options given a) no b) two c) zero d) five

A: a
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Q: Rainfall occurs only in the winter and is followed by ____ to nine months of sustained drought.\Question: Choose the right answer from options given a) five b) three c) seven d) eight

A:
d
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