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:
China is reportedly in the top ____ nations in industrial output.\Question: Choose the right answer from options given a) seven b) ten c) three d) five

Ex Output:
b


Ex Input:
Lung disease is America's number three killer, responsible for ____ in seven deaths.\Question: Choose the right answer from options given a) five b) nine c) one d) four

Ex Output:
c


Ex Input:
Heart attacks occur most often around ____ in the morning.\Question: Choose the right answer from options given a) five b) two c) no d) eight

Ex Output:

a