This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CVS Embryology, Subject name: Anatomy
[{'content': 'The sinus occupying coronary sulcus is derived from which of the following? \nSelect and explain. \nA. Truncus aeriosus, B. Bulbus cordis, C. Primitive ventricle, D. Sinus venosus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The coronary sinus occupies coronary sulcus. The coronary sinus is derived from theleft horn of sinus venosus.', 'role': 'assistant'}]