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
A 5-year old child presents with perivascul a r IgA deposition and neutrophilic. collection. There is erythematous rash on the lower limb and non-blanching purpura. Probable diagnosis is ? 
Select and explain. 
A. Henoch-Schonlein purpura, B. Wegener's granulomatosis, C. Vasculitis, D. Kawasaki's disease
A: Henoch-Schonlein purpura
Answer: A: Henoch-Schonlein purpura 
Explanation: Ans is 'a' i.e., Henoch-Schonlein purpura