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': 'Angular vein is formed by: \nSelect and explain. \nA. Superficial temporal and supratrochlear vein, B. Superficial temporal and supraorbital vein, C. Retromandibular and supratrochlear vein, D. Supraorbital and supratrochlear vein', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The supratrochlear and supraorbital veins unite at the medial angle of the eye forming the angular vein which continues down as the facial vein.', 'role': 'assistant'}]