This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Papulosquamous disorders, Subject name: Dental
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: vit D3 analoguesSuch as calcipotriene,calcipotriol, tacalcitol,maxacalcitol. mechanism of action: Anti inflammatory effect,Induce keratinocyte differentiation, Inhibit epidermal proliferation . Used in psoriasis. advantages: no steroid induced side effects can be used for prolonged periods. IADVL textbook of dermatology page1044