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: Electrolytic capacitors have a useful life of about ____ years.\Question: Choose the right answer from options given a) ten b) eight c) zero d) seven
Example Output: a

Example Input: Honeybees have ____ jobs.\Question: Choose the right answer from options given a) ten b) one c) three d) two
Example Output: d

Example Input: Most infected people have ____ symptoms and are never diagnosed.\Question: Choose the right answer from options given a) no b) four c) two d) zero
Example Output:
a