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').

Ex Input:
Casinos have no windows and they have ____ clocks.\Question: Choose the right answer from options given a) six b) four c) eight d) no

Ex Output:
d


Ex Input:
Poles CAN occur at ____ frequency.\Question: Choose the right answer from options given a) six b) four c) zero d) eight

Ex Output:
c


Ex Input:
Monarchs go through a complete metamorphosis in three to ____ weeks.\Question: Choose the right answer from options given a) three b) six c) eight d) one

Ex Output:

b