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
Note a delayed type of hypersensitive reactions 
Select and explain. 
A. Ahus reaction, B. Bronchial asthma, C. Hemolytic anemia, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Ahus reaction; 'b' i.e., Bronchial asthma; 'c' i.e., Haemolytic anemia