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
A patch test is what type of hypersensitivity? 
Select and explain. 
A. Type 4, B. Type 1, C. Type 2, D. Type 3
A: Type 4
Answer: A: Type 4 
Explanation: HYPERSENSITIVITY REACTIONS