Which nerve branch contributes to the formation of the tympanic plexus?

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Tympanic branch of the glossopharyngeal nerve (IX)The vagus nerve (X)The facial nerve (VII)The mandibular division of the trigeminal nerve (V3)

Explanation

The tympanic plexus is primarily formed by the tympanic branch of the glossopharyngeal nerve (cranial nerve IX). Other nerves such as the vagus, facial, and mandibular nerves do not contribute to this plexus.