Which structure listed below is not located within the cavernous sinus?

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Oculomotor nerve (cranial nerve III)Trochlear nerve (cranial nerve IV)Medial cerebral arteryTrigeminal nerve (cranial nerve V)

Explanation

The cavernous sinus contains several cranial nerves including the oculomotor (III), trochlear (IV), and trigeminal (V) nerves. However, the medial cerebral artery does not pass through the cavernous sinus.