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: Pathology
Hypersensitivity angiitis is seen in? 
Select and explain. 
A. SLE, B. Polyarteritis Nodosa, C. Buerger's disease, D. Henoch Schonlein purpura
D: Henoch Schonlein purpura
Answer: D: Henoch Schonlein purpura 
Explanation: Cutaneous small-vessel vasculitis (also known as “Cutaneous leukocytoclastic angiitis and “Hypersensitivity angiitis”) is an inflammation of small blood vessels characterized clinically by palpable purpura.
Subtypes of Small-Vessel Vasculitis Include:
• Henoch-Schonlein purpura
• Acute hemorrhagic edema of infancy
• Urticarial vasculitis
• Cryoglobulinemic vasculitis