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
Post hepatic Portal Hypertension is caused by 
Select and explain. 
A. Portal vein thrombosis, B. Congenital hepatic fibrosis, C. Budd-Chiari syndrome, D. All of the above
C: Budd-Chiari syndrome
Answer: C: Budd-Chiari syndrome 
Explanation: Post-sinusoidal cause of Poratl hypertension
Budd-Chiari syndrome
Veno occlusive disease