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').

Input: Consider Input: Ozone is a naturally occurring molecule containing ____ atoms of oxygen.\Question: Choose the right answer from options given a) three b) five c) nine d) eight

Output: a


Input: Consider Input: Nematodes occur in ____ general forms.\Question: Choose the right answer from options given a) nine b) two c) seven d) ten

Output: b


Input: Consider Input: Some rams have ____ fully developed horns, a trait shared by few other breeds of the world.\Question: Choose the right answer from options given a) nine b) four c) ten d) five


Output: b