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: Nymphs feed and mature through five instars in about ____ to eight weeks.\Question: Choose the right answer from options given a) six b) five c) seven d) zero

Output: a


Input: Consider Input: Rabbits reach sexual maturity between three and ____ months of age.\Question: Choose the right answer from options given a) three b) seven c) six d) zero

Output: c


Input: Consider Input: Dunes are of ____ types - linear and parabolic.\Question: Choose the right answer from options given a) three b) four c) ten d) two


Output: d