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
Which of the following are type 3 hypersensitivity reactions? 
Select and explain. 
A. Good Pasteur syndrome, B. Serum sickness, C. Ahus reaction, D. Asthma
B: Serum sickness
Answer: B: Serum sickness 
Explanation: Answer- B. Serum sicknessLocal-Ahus reactionSystemic-serum sicknessSchick testPolyaeritis nodosa (PAN)Rheumatoid ahritisSLEAcute viral hepatitisPenicillamine toxicityHyperacute graft rejectionType 2 lepra reaction (ENL)Hypersensitivity pneumonitisInfective endocarditisHenoch schonlein purpuraGlomerulonephritis