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:
Bulls can stand as tall as ____ feet at the shoulders.\Question: Choose the right answer from options given a) one b) five c) seven d) four

Ex Output:
b


Ex Input:
Some people try to count to ____ when they feel angry.\Question: Choose the right answer from options given a) no b) ten c) seven d) five

Ex Output:
b


Ex Input:
Thoroughbreds have ____ natural gaits-walk, trot, canter and gallop.\Question: Choose the right answer from options given a) no b) one c) four d) six

Ex Output:

c