This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Ahus reaction is what type of hypersensitivity reaction 
Select and explain. 
A. Localized immune complex, B. Ag- Ab reaction, C. Complement mediated, D. Ab mediated
A: Localized immune complex
Answer: A: Localized immune complex 
Explanation: Ahus reaction Localized area of tissue necrosis resulting from acute immune complex vasculitis, usually elicited in the skin. "SHARP" S- Serum sickness, Schick test, SLE H- HS pneumonitis (Farmers lung), HSP A- Ahus reaction R- Reactive ahritis, RA, Raji assay P - PAN, PSGN