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: Organisms have ____ forms of nucleic acid.\Question: Choose the right answer from options given a) four b) three c) two d) one

Output: c


Input: Consider Input: China is reportedly in the top ____ nations in industrial output.\Question: Choose the right answer from options given a) seven b) ten c) three d) five

Output: b


Input: Consider Input: Sexual maturity is reached at between one and ____ years.\Question: Choose the right answer from options given a) five b) two c) six d) four


Output: b