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 Input:
Reality is more than what can be perceived with the ____ senses.\Question: Choose the right answer from options given a) five b) four c) ten d) one

Ex Output:
a

Ex Input:
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

Ex Output:
b

Ex Input:
Elephants have four molars, which are replaced ____ times, for a total of six sets in a lifetime.\Question: Choose the right answer from options given a) five b) no c) three d) one

Ex Output:
a