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:
Cannons are a three ball shot from a corner spot or on the ____ yard line.\Question: Choose the right answer from options given a) no b) four c) five d) one

Ex Output:
d


Ex Input:
Human females have ____ X chromosomes.\Question: Choose the right answer from options given a) two b) six c) one d) eight

Ex Output:
a


Ex Input:
Crickets produce sound by rubbing their ____ front wings together.\Question: Choose the right answer from options given a) five b) six c) two d) seven

Ex Output:

c