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:
Many people have ____ symptoms until they suffer chest pains or a heart attack.\Question: Choose the right answer from options given a) three b) one c) no d) seven

Ex Output:
c


Ex Input:
Female bilbies have a backward-opening pouch with ____ nipples.\Question: Choose the right answer from options given a) no b) two c) five d) eight

Ex Output:
d


Ex Input:
Advanced monotheism recognises a universal sway of ____ opposite forces.\Question: Choose the right answer from options given a) two b) nine c) five d) zero

Ex Output:

a