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:
Most volcanoes erupt for ____ to four weeks and then rest.\Question: Choose the right answer from options given a) three b) four c) one d) eight

Ex Output:
a


Ex Input:
Fryers have ____ thermostats.\Question: Choose the right answer from options given a) five b) three c) two d) one

Ex Output:
c


Ex Input:
Scorpions have ____ legs.\Question: Choose the right answer from options given a) zero b) no c) eight d) two

Ex Output:

c