This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
Parasite causing peripoal fibrosis of the liver is - 
Select and explain. 
A. Schistosoma japonicum, B. Schistosoma mansoni, C. Schistosoma haematobium, D. Schistosoma mekongi
B: Schistosoma mansoni
Answer: B: Schistosoma mansoni 
Explanation: Symptoms are mainly intestinal Intestinal bilharziasis or schistosomal dysentery Patients develop abdominal pain and bloody diarrhea (refer pgno:120 baveja 3 rd edition)