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
All of the following are causes of 'propoionate sho stature' EXCEPT? 
Select and explain. 
A. Turner syndrome, B. Down syndrome, C. Osteogenesis imperfecta, D. Chronic kidney disease
C: Osteogenesis imperfecta
Answer: C: Osteogenesis imperfecta 
Explanation: Osteogenesis imperfecta is one of the causes of dispropoionate sho stature, where the limbs are mainly involved, as compared to trunk. Osteogenesis imperfecta: MC cause of multiple fractures in childhood. Autosomal dominant Defected type 1 collagen. C/F: Bone shape- not maintained. Deformed bones, fractures in different areas & different stages of healing. Blue sclera Deafness Dentigerous imperfecta Rx: Gene therapy