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: Skin
[{'content': 'The "angry back" phenomenon is related to ONE of the following: \nSelect and explain. \nA. Patch test, B. Prick test, C. RAST, D. Desensitization', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It refers to the non specific false positive patch test positive reactions when the test is done during active dermatitis. It is also called Excited skin syndrome.', 'role': 'assistant'}]