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').

Today there are ____ UK hospitals doing heart transplants.\Question: Choose the right answer from options given a) three b) five c) six d) nine
d

Japan is the second largest single country importer with about ____ per cent of world oat imports.\Question: Choose the right answer from options given a) five b) one c) four d) eight
a

Aluminum accounts for about ____ quarters of the materials used in making aircraft.\Question: Choose the right answer from options given a) three b) nine c) eight d) zero

a