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 perivascular IgA deposition and neutrophil 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: None