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What vein is formed by the posterior division and the posterior auricular vein?
External jugular vein
Internal jugular vein
Common facial vein
Retromandibular vein
The correct answer is: External jugular vein
The correct answer is the External jugular vein. The External jugular vein is formed by the union of the posterior division of the retromandibular vein and the posterior auricular vein. This vein then descends down the neck, eventually draining into the subclavian vein. Option B, the Internal jugular vein, is incorrect because it is formed by the union of the inferior petrosal sinus and sigmoid sinus, not the posterior division and posterior auricular vein. Option C, the Common facial vein, drains the face and communicates with the superior ophthalmic vein and anterior facial vein, but it is not formed by the posterior division and posterior auricular vein. Option D, the Retromandibular vein, is a tributary of the facial vein and is not directly formed by the posterior division and posterior auricular vein.