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
Vitamin D analogue calcitriol is useful in the treatment of 
Select and explain. 
A. Lichen Planus, B. Psoriasis, C. Phemphigus, D. Leprosy
B: Psoriasis
Answer: B: Psoriasis 
Explanation: B. i.e. Psoriasis