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:
Traditional neon electrifies the inert gas from ____ directions.\Question: Choose the right answer from options given a) two b) nine c) one d) six

Ex Output:
a


Ex Input:
Hybridization is the practice of ____ different species interbreeding.\Question: Choose the right answer from options given a) no b) one c) two d) three

Ex Output:
c


Ex Input:
Coffee has a half-life of ____ to six hours.\Question: Choose the right answer from options given a) four b) two c) seven d) five

Ex Output:

a