Canal joining middle ear with buccal cavity is

Inguinal canal

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Eustachian canal

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Haversian canal

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Aqueduct of Sylvius

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Solution

The correct option is B Eustachian canal
The eustachian tube is a small canal, that connects the middle ear (tympanic cavity) to the back of the nose and upper throat. Its purpose is to equalize the air pressure in the middle ear with the pressure outside it.

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