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: Medicine
One of the following is a characteristic of Henoch- Schonlein Purpura - 
Select and explain. 
A. Blood in stool, B. Thrombocytopenia, C. Intracranial hemorrhage, D. Susceptibility to infection
A: Blood in stool
Answer: A: Blood in stool 
Explanation: None