Anatomy All except one is true regarding carotid sheath A Carotid sheath contains internal carotid artery, internal jugular vein, and vagus nerve B It is formed by investing layer of deep cervical fascia, pretracheal and prevertebral fascia C Sympathetic chain runs vertically through the carotid sheath D 9,11, and 12th cranial nerves pierce the upper part of carotid sheath 💡 Explanation All except one is true regarding carotid sheath ✓ Correct Answer: C. Sympathetic chain runs vertically through the carotid sheath