Evaluate the following statements regarding breathing mechanisms:
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Diaphragm contracts during inhalation.
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Ribs move outward during exhalation.
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Lungs expand as the chest cavity enlarges.
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Exhalation is an active process involving muscle contraction.
1
1, 2, 3 are correct
2
2, 3, 4 are correct
3
1 and 3 are correct
4
All are correct