This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypersensitivity Reactions: Immune-Mediated Injury, Subject name: Pathology
Serum sickness is which type of reaction? 
Select and explain. 
A. Type-1 hypersensitivity, B. Type -2 hypersensitivity, C. Type -3 hypersensitivity, D. Type -4 hypersensitivity
C: Type -3 hypersensitivity
Answer: C: Type -3 hypersensitivity 
Explanation: Ans. is 'c' i.e., Type -3 hypersensitivity Type ni (IgG IgM. complement and leucocyte mediated)o Local-Arthus reactiono Systemic-serum sicknesso Schick testo Polyarteritis nodosa (PANo Rheumatoid arthritisoSLEo Acute viral hepatitiso Penicillamine toxicityo Hyperacute graft rejectiono Type 2 lepra reaction (ENL)o Hypersensitivity pneumonitiso R.Ao Infective endocarditiso Henoch schonlein purpurao Glomerulonephritis