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': 'Submandibular gland is situated in: \nSelect and explain. \nA. Digastric triangle, B. Carotid triangle, C. Muscular triangle, D. Deep to hyoglossus muscle', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The digastric triangle is subdivided into anterior and posterior parts by the stylomandibular ligament, which extends from the tip of the styloid process to the angle of the mandible. The posterior part of the triangle is continuous above with the parotid region.\nContents in the anterior part of the triangle:\n\nSubmandibular salivary gland.\nSubmandibular lymph nodes.\nHypoglossal nerve.\nFacial vein (lies superficial to the gland).\nFacial artery (lies deep to the gland).\nSubmental artery.\nMylohyoid nerve and vessels.\n\nContents in the posterior part of the triangle:\n\nExternal carotid artery.\nCarotid sheath and its contents.\nStructures passing between the external and internal carotid arteries.', 'role': 'assistant'}]