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: Ankle joint has ____ degrees of freedom.\Question: Choose the right answer from options given a) seven b) eight c) four d) three

Output: d


Input: Consider Input: Butterflies have ____ stages in their life cycle.\Question: Choose the right answer from options given a) two b) four c) no d) eight

Output: b


Input: Consider Input: Platinum is electroplated from ____ different electrolytes.\Question: Choose the right answer from options given a) two b) ten c) four d) zero


Output: a