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: Females have two X-chromosomes, ____ from each parent.\Question: Choose the right answer from options given a) ten b) four c) one d) zero

Output: c


Input: Consider Input: Echinoderms usually have ____ appendages, but there are some exceptions.\Question: Choose the right answer from options given a) ten b) five c) seven d) three

Output: b


Input: Consider Input: Incomplete metamorphosis takes place with nymphs hatching in about ____ months.\Question: Choose the right answer from options given a) five b) three c) six d) four


Output: d