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: Pediatrics
Posterior iliac horns are seen in – 
Select and explain. 
A. Fisher's syndrome, B. Crouzan syndrome, C. Nail patella syndrome, D. Pierre Robbins syndrome
C: Nail patella syndrome
Answer: C: Nail patella syndrome 
Explanation: Nail-Patella syndrome is characterized by : 

Small or absent nails                  
Overextension of joints  
Small or absent patella    
Posterior iliac horns  
Renal anomalies 
Skin laxity
Hyperhidrosis