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Which of the following fascia surrounds the trachea, esophagus, and thyroid gland?

A primary oral infection is one that spreads to the oral cavity from somewhere else in the body.

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All of the following symptoms are related to an infection of the paranasal sinuses that resulted from a direct spread of infection from the teeth and associated oral tissues EXCEPT one. Which one is the EXCEPTION?

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What is the difference between == and ===?

Which value is falsy in JavaScript?