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').

Example Input: Chemistry has ____ less important names.\Question: Choose the right answer from options given a) ten b) no c) eight d) nine
Example Output: b

Example Input: Influenza epidemics are ____ times more likely during solar maxima.\Question: Choose the right answer from options given a) ten b) eight c) no d) four
Example Output: d

Example Input: Formal rush is a set of ____ parties held during the third week of the fall semester.\Question: Choose the right answer from options given a) no b) two c) seven d) four
Example Output:
d