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: Lizards generally have ____ legs and movable eyelids.\Question: Choose the right answer from options given a) four b) two c) five d) zero

Output: a

Input: Consider Input: Paleontologists specialize in ____ main areas.\Question: Choose the right answer from options given a) eight b) five c) no d) six

Output: b

Input: Consider Input: Sheep pox is a notifiable disease in the ____ Maghreb countries.\Question: Choose the right answer from options given a) three b) seven c) no d) four
Output: d