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:
Black women die from cervical cancer at ____ times the rate of white women.\Question: Choose the right answer from options given a) five b) one c) two d) three

Ex Output:
d


Ex Input:
Japan is a highly urbanised country, with approximately three in every ____ people living in cities.\Question: Choose the right answer from options given a) seven b) two c) four d) eight

Ex Output:
c


Ex Input:
Photons have ____ mass or charge, and they travel in straight lines.\Question: Choose the right answer from options given a) five b) no c) zero d) nine

Ex Output:

b