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 trabeculated pa of the right ventricle is derived from which of the following? \nSelect and explain. \nA. Truncus aeriosus, B. Bulbus cordis, C. Primitive ventricle, D. Primitive atrium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C. The trabeculated pa / rough pa /anterior pa of the right ventricle is derived from the primitive ventricle.', 'role': 'assistant'}]