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:
Most people have ____ kidneys.\Question: Choose the right answer from options given a) two b) five c) seven d) six

Ex Output:
a


Ex Input:
Interpersonal conflict exists whenever ____ or more people disagree.\Question: Choose the right answer from options given a) five b) seven c) no d) two

Ex Output:
d


Ex Input:
Friction occurs when ____ bodies rub against each other.\Question: Choose the right answer from options given a) two b) no c) eight d) ten

Ex Output:

a