This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Embryology 2, Subject name: Anatomy
[{'content': 'Ribs develop from ? \nSelect and explain. \nA. Endothoracic fascia, B. Para axial mesenchyme, C. Deep intercostal fascia, D. Superficial intercostal fascia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ribs which are attached to veebra posteriorly is derived from paraxial mesenchyme which is derived from mesoderm. Mesoderm - Paraxial Mesoderm, Intermediate Mesoderm, Lateral plate Mesoderm Paraxial mesoderem forms somites -sclerotome, myotome and dermatome. Sclerotome forms veebra and ribs. Myotome forms skeletal muscles. Dermatomeforms dermis(skin)', 'role': 'assistant'}]