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

Ex Output:
c


Ex Input:
Bloody diarrhea lasts for two to ____ days.\Question: Choose the right answer from options given a) nine b) five c) three d) no

Ex Output:
b


Ex Input:
Lakes cover about ____ percent of Earth's continental area.\Question: Choose the right answer from options given a) six b) three c) zero d) two

Ex Output:

b