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:
Females can only have four babies at ____ time.\Question: Choose the right answer from options given a) no b) one c) nine d) three

Ex Output:
b


Ex Input:
Some skulls show the marks of up to ____ bullets.\Question: Choose the right answer from options given a) five b) three c) eight d) six

Ex Output:
d


Ex Input:
Sheep pox is a notifiable disease in the ____ Maghreb countries.\Question: Choose the right answer from options given a) three b) seven c) no d) four

Ex Output:

d