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: Today there are ____ federal states, each based on cultural affiliations.\Question: Choose the right answer from options given a) one b) nine c) seven d) zero
Example Output: b

Example Input: Stringers consist of ____ narrow pieces of wood glued together.\Question: Choose the right answer from options given a) ten b) three c) five d) seven
Example Output:
b