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
Treatment of choice for acute generalised lichen planus - 
Select and explain. 
A. Topical coicosteroids, B. Systemic coicosteroids, C. Antihistaminics, D. emollients
B: Systemic coicosteroids
Answer: B: Systemic coicosteroids 
Explanation: treatment of choice for acute generalised lichenplanus- first line - acetretin , second line - systemic coicosteroids. treatment of choice for severe cutaneous lichen planus which is resistant to treatment with systemic steroids and retinoids is cyclosporine treatment of choice for localised lichen planus- first line topical potent coicosteroids, second line tacrolimus. treatment of choice for erosive oral lichen planus- first line - muco adhesive formulation of topical stroids. eg: triamcinolone acetonide or clobetasol propionate,second line - topical retinoids etretinate , third line topical tacrolimus, cyclosporine mouth gargles. IADVL TEXTBOOK od dermatology, page 1079