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: Most fats ingested are triglycerides i.e. ____ fatty acid chains connected to a glycerol molecule.\Question: Choose the right answer from options given a) seven b) two c) three d) six
Example Output: c

Example Input: ATMs are expensive machines with an average useful life of ____ to fifteen years.\Question: Choose the right answer from options given a) nine b) eight c) ten d) two
Example Output: c

Example Input: Cows normally expel the placenta within two to ____ hours.\Question: Choose the right answer from options given a) five b) eight c) ten d) nine
Example Output:
b