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').

Input: Consider Input: Most endocrinologists see patients every ____ months throughout the pregnancy.\Question: Choose the right answer from options given a) six b) two c) zero d) three

Output: b


Input: Consider Input: Cats have ____ toes on their front paws, but only four touch the ground when walking.\Question: Choose the right answer from options given a) six b) nine c) five d) zero

Output: c


Input: Consider Input: Heterogenous rays vary from ____ to at least five cells wide.\Question: Choose the right answer from options given a) two b) nine c) one d) four


Output: c