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: Photosynthesis occurs in ____ phases.\Question: Choose the right answer from options given a) four b) two c) nine d) five

Output: b


Input: Consider Input: Psychiatrists say that one in ____ people are mentally ill.\Question: Choose the right answer from options given a) one b) two c) four d) nine

Output: c


Input: Consider Input: Sunflowers require ____ to seven days from planting to emergence.\Question: Choose the right answer from options given a) five b) eight c) two d) three


Output: a