True about sphenoid sinus:
Correct Answer: Open in sphenoethmoid recess
Description: All paranasal sinuses are lined by respiratory epitheliumi.e option a is incorrect. sphenoid sinus:Impoant points it is not present at bih it occupies the body of sphenoid ostrum of sphenoid sinus is situated in the upper pa of anterior wall and drains intlo spheno ethmoidal recess on x ray sphenoid sinus is visible by 4 years of age. Ref Dhingra 6/e,p 188
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ENT
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