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:
Fawns weigh about ____ to nine pounds at birth.\Question: Choose the right answer from options given a) five b) ten c) nine d) six

Ex Output:
d


Ex Input:
Heat pumps give off ____ fumes or harmful products of combustion.\Question: Choose the right answer from options given a) four b) zero c) six d) no

Ex Output:
d


Ex Input:
Every human being carries six to ____ abnormal recessive genes.\Question: Choose the right answer from options given a) two b) five c) seven d) eight

Ex Output:

d