Q
Functional importance of maxillary sinus is______________?
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A
A. Lightening of skull weight and production of bactericidal lysozyme to the nasal cavity
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B
B. Protects the brain against exposure to cold air by arresting air in sinus temporarily
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C
C. Resonance of voice and enhancement of faciocranial resistance to mechanical shock
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D
D. All of the above
Correct Answer:
D. D. All of the above
