This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poal Hypeension, Subject name: Surgery
Which of the following is the most common cause of pre-sinusoidal intrahepatic poal hypeension? 
Select and explain. 
A. Cirrhosis, B. Schistosomiasis, C. Sarcoidosis, D. Graft-versus-host disease
B: Schistosomiasis
Answer: B: Schistosomiasis 
Explanation: MC cause of intrahepatic presinusoidal poal hypeension - Schistosomiasis Mc cause of Sinusoidal poal hypeension - Cirrhosis