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: Microbiology
ABO incompatibility is an example for 
Select and explain. 
A. Type-I HSN reaction, B. Type-II HSN reaction, C. Type-III HSN reaction, D. Type-IV HSN reaction
B: Type-II HSN reaction
Answer: B: Type-II HSN reaction 
Explanation: Type 2 HSN

Transfusion reaction.
Erythroblastosis fetalis.
Grave's disease.
Myasthenia gravis.