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:
Young emus are very vulnerable to disease until they are about ____ months old.\Question: Choose the right answer from options given a) no b) ten c) six d) three

Ex Output:
d


Ex Input:
Normal cells have ____ copies of each chromosome.\Question: Choose the right answer from options given a) two b) five c) eight d) no

Ex Output:
a


Ex Input:
Most school aged children pass at least three stools per week, with an average of ____ stool per day.\Question: Choose the right answer from options given a) one b) two c) four d) eight

Ex Output:

a