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').

[Q]: Death occurs during the first ____ days of illness without intensive care.\Question: Choose the right answer from options given a) seven b) eight c) five d) nine
[A]: a


[Q]: Metabolism have ____ stages-catabolism and anabolism.\Question: Choose the right answer from options given a) nine b) two c) five d) three
[A]: b


[Q]: Human orbits are cone-shaped and about ____ centimeters deep in the skull.\Question: Choose the right answer from options given a) two b) nine c) ten d) five
[A]:
d