This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Ahus phenomenon is an example of which hypersensitivity - 
Select and explain. 
A. Type I, B. Type II, C. Type III, D. Type IV
C: Type III
Answer: C: Type III 
Explanation: Ahus reaction is type III hypersensitivity reaction. Type III hypersensitivity reaction is immune complex diseases. Damage is caused by antigen- antibody complexes. These may precipitate in and around small blood vessels causing damage to cells secondarily or on membranes, interfering with their function. Reference : Anathanarayan & paniker's 9th edition, pg no:162 <\p>