This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteology of Thorax, Subject name: Anatomy
[{'content': 'Ribs are developed from - \nSelect and explain. \nA. Cloaca, B. Sclerotome, C. Endodermal cloaca, D. Primitive gut', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Sclerotome o Ribs are derived from lateral cells of sclerotome.Derivatives of paraxial mesodermo Paraaxial mesoderm is organized into somites which in turn gives rise toSclerotomes: Form axial skeleton including vertebrae, ribs and parts of neurocranium,Myotomes : Form all voluntary (skeletal) muscles of head, trunk and limbs,Dermatomes : Form dermis of skin, especially over dorsal regions. SCLEROTOME-SOMITE|Lateral sclerotomeVertebral arch ribs|Dorsal sclerotomeSpinous process|Ventral sclerotomeVertebral bodyAnnulus fibrosus|DERMOMTOYOMESkeletal muscleDemits", 'role': 'assistant'}]