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: Fluoroscopy has ____ magnification modes and image capture.\Question: Choose the right answer from options given a) zero b) two c) nine d) eight
Example Output: b

Example Input: Fawns weigh about ____ to nine pounds at birth.\Question: Choose the right answer from options given a) five b) ten c) nine d) six
Example Output: d

Example Input: All salamanders have scaleless skin, ____ legs and a tail.\Question: Choose the right answer from options given a) two b) four c) zero d) three
Example Output:
b