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: Microbiology
Schistosoma japonicum resides in - 
Select and explain. 
A. Vesical Plexus, B. Splenic Vein, C. Systemic Circulation, D. Gall bladder
B: Splenic Vein
Answer: B: Splenic Vein 
Explanation: Habitat

S. hematobium: Vesicle plexus (veins of urinary bladder, pelvis ureter)
S. mansoni: Inferior mesentric plexus
S. japonicum: Superior mesentric plexus and its radicles (splenic vein).