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': 'Diaphragm develops from all except : \nSelect and explain. \nA. Septum transervsum, B. Dorsal merocaldium, C. Pleuro - peritoneal membrane, D. Cervical myotomes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Dorsal merocaardium - forms transverse sinus.\nMuscular ingrowth from body wall is contributed by cervical somiks C3 - C5.', 'role': 'assistant'}]