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': 'A 55-year-old male, with uncontrolled diabetes mellitus and hypeension, developed severe air-borne contact dermatitis. The most appropriate drug for his treatment would be: \nSelect and explain. \nA. Systemic coicosteroids, B. Thalidomide, C. Azathioprine, D. Cyclosporine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Azathioprine In contact dermatitis, the allergic reaction is mediated by delayed hypersensitivity (cell mediated immunity). It is treated by: - Antihistamincis - Steroids (topical/systemic) - Agents depressing cell mediated immunity as cyclosporine, tacrolimus, azathioprine', 'role': 'assistant'}]