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
Idiopathic thrombocytopenic purpura is due to which type of hypersensitivity? 
Select and explain. 
A. Type I Hypersensitivity, B. Type II Hypersensitivity, C. Type III Hypersensitivity, D. Type IV Hypersensitivity
B: Type II Hypersensitivity
Answer: B: Type II Hypersensitivity 
Explanation: Involve activation of complement by IgG or IgM binding to an antigenic cell.
Antigenic cell is lysed.