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:
Oranges signify good health, and the number ____ sounds like the word for prosperity.\Question: Choose the right answer from options given a) eight b) ten c) seven d) five

Ex Output:
a


Ex Input:
All baleen whales have ____ blow holes.\Question: Choose the right answer from options given a) zero b) four c) seven d) two

Ex Output:
d


Ex Input:
Pigeons are social birds, so plan on three to ____ mated pairs to start.\Question: Choose the right answer from options given a) zero b) six c) five d) no

Ex Output:

c