This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sho Stature, Subject name: Pediatrics
[{'content': "Upper segment : lower segment ratio decreases in all of the following except? \nSelect and explain. \nA. Spondylo epiphyseal dysplasia, B. Alagille syndrome, C. Achondroplasia, D. Pott's disease", 'role': 'user'}, {'content': "Answer: C \nExplanation: Upper segment : lower segment ratio increases in Achondroplasia- cause of sho limb dwarfism. Sho trunk dwarfism (US:LS ratio- decreases) Sho limb dwarfism (US:LS ratio- increases) Sho- Spondyloepiphyseal dysplasia Rickets Man- Mucopolysaccharidosis Achondroplasia May- Mucolipidosis Osteogenesis imperfecta Climb- Caries spine (pott's disease) Congenital hypothyroidism High- Hemiveebra Chondroectodermal dysplasia", 'role': 'assistant'}]