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:
Guinea has ____ territories or colonies.\Question: Choose the right answer from options given a) no b) seven c) three d) eight

Ex Output:
a


Ex Input:
Most birds have ____ toes, three that face forward and one rearward.\Question: Choose the right answer from options given a) two b) ten c) nine d) four

Ex Output:
d


Ex Input:
Cockatiels average ____ to five eggs per nest, with an egg typically laid every other day.\Question: Choose the right answer from options given a) ten b) seven c) four d) six

Ex Output:

c