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:
Baboons can travel up to ____ miles a day.\Question: Choose the right answer from options given a) seven b) three c) two d) six

Ex Output:
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:
Nymphs go through seven molts before becoming adults, which takes approximately ____ year.\Question: Choose the right answer from options given a) eight b) one c) no d) zero

Ex Output:

b