This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Common Facial vein is formed by the union of \nSelect and explain. \nA. Anterior facial and posterior facial veins, B. Anterior facial and posterior auricular veins, C. Anterior facial and maxillary veins, D. Anterior facial and anterior branch of the posterior facial vein', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The scalp on each side of the midline is drained by five veins. The\xa0veins\xa0of\xa0the\xa0scalp\xa0accompany\xa0the\xa0arteries\xa0and\xa0have similar names. These are as follows:\n\nSupratrochlear and supraorbital veins: They join each other at the medial angle of the eye to form the angular vein,\xa0which\xa0continues\xa0downwards\xa0as\xa0the\xa0facial\xa0vein behind the facial artery.\nSuperficial temporal vein: It descends in front of tragus to enter the parotid gland where it joins the maxillary vein to form the retromandibular vein, which terminates by\xa0dividing\xa0into anterior\xa0and\xa0posterior\xa0divisions.\xa0The anterior\xa0division\xa0unites\xa0with\xa0the\xa0facial\xa0vein\xa0to\xa0form common\xa0facial\xa0vein,\xa0which\xa0drains\xa0into\xa0the\xa0internal jugular vein.\nPosterior auricular vein: It descends behind the auricle and\xa0 unites\xa0with\xa0the\xa0posterior\xa0division\xa0of\xa0the\xa0retromandibular vein to form the external jugular vein, which drains into the subclavian vein.\nOccipital\xa0vein: It\xa0terminates in\xa0the\xa0suboccipital\xa0venous plexus.', 'role': 'assistant'}]