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: Spores have ____ combinations of sexes.\Question: Choose the right answer from options given a) four b) five c) seven d) three

Output: a


Input: Consider Input: Females inherit ____ X chromosomes, one from each parent.\Question: Choose the right answer from options given a) five b) two c) no d) seven

Output: b


Input: Consider Input: International mail consists of ____ categories of mail.\Question: Choose the right answer from options given a) six b) one c) three d) nine


Output: c