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Which of the following structures are regions of the lungs?

A. Apex, base, hilum
B. Cilia, adenoids, mucous, epiglottis
C. Frontal, maxillary, sphenoidal, ethmoidal
D. Eustachian, pharynx, bronchi

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User Nuris
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The answer is D- Eustachian, pharynx, and bronchi