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: Living cells have at least ____ parts.\Question: Choose the right answer from options given a) seven b) three c) zero d) four
Example Output: b

Example Input: Insects have ____ pairs of legs and three body segments.\Question: Choose the right answer from options given a) one b) nine c) no d) three
Example Output: d

Example Input: All giraffes are one species containing ____ subspecies distinguished only by spot patterns.\Question: Choose the right answer from options given a) ten b) four c) seven d) nine
Example Output:
d