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:
Shamrocks can be ____ of four leafs.\Question: Choose the right answer from options given a) six b) seven c) zero d) three

Ex Output:
d


Ex Input:
Healthcare providers diagnose ____ general types of insomnia.\Question: Choose the right answer from options given a) two b) eight c) one d) three

Ex Output:
a


Ex Input:
Most jellyfish have ____ basic life stages.\Question: Choose the right answer from options given a) six b) seven c) two d) eight

Ex Output:

c