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:
Oranges signify good health, and the number ____ sounds like the word for prosperity.\Question: Choose the right answer from options given a) eight b) ten c) seven d) five

Ex Output:
a


Ex Input:
Ozone is a molecule containing ____ oxygen atoms.\Question: Choose the right answer from options given a) one b) nine c) no d) three

Ex Output:
d


Ex Input:
Conditionality is a ____ edged weapon.\Question: Choose the right answer from options given a) nine b) two c) three d) eight

Ex Output:

b