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
Psoriasis is exacerbated by- 
Select and explain. 
A. Lithium, B. B- blockers, C. Antimalarials, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: D. i.e. All