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: Selenium is ____ times more poisonous than arsenic.\Question: Choose the right answer from options given a) one b) five c) eight d) two

Output: b


Input: Consider Input: Today there are ____ federal states, each based on cultural affiliations.\Question: Choose the right answer from options given a) one b) nine c) seven d) zero

Output: b


Input: Consider Input: Chlorine is used by the paper industry for ____ purposes.\Question: Choose the right answer from options given a) zero b) six c) four d) two


Output: d