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').

Distilled water enters the body with ____ minerals but leaves the body with minerals.\Question: Choose the right answer from options given a) zero b) no c) one d) nine
b

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

Dualism holds that there are ____ fundamental substances.\Question: Choose the right answer from options given a) two b) seven c) nine d) no

a