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]: Asthma accounts for ____ in six of all pediatric emergency visits in the United States.\Question: Choose the right answer from options given a) four b) seven c) one d) six
[A]: c


[Q]: Water is present in all ____ phases in Earth s atmosphere.\Question: Choose the right answer from options given a) six b) nine c) two d) three
[A]: d


[Q]: Emitted energy is difference between the ____ energy levels.\Question: Choose the right answer from options given a) four b) three c) zero d) two
[A]:
d