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').

Example Input: Some programming languages have ____ or more standards.\Question: Choose the right answer from options given a) no b) seven c) two d) three
Example Output: c

Example Input: All butterflies go through ____ distinct stages in their lives.\Question: Choose the right answer from options given a) eight b) seven c) four d) three
Example Output: c

Example Input: Chronic pain refers to pain of long duration, typically ____ months or greater.\Question: Choose the right answer from options given a) three b) ten c) zero d) two
Example Output:
a