A patient presented with scarring alopecia, thinned nails, hyperpigmented macular lesions over the trunk and oral mucosa. Diagnosis is:
Psoriasis
Leprosy
Lichen planus
Pemphigus
Scarring alopecia is found in LP and Leprosy both. But oral mucosal involvement and thinning of nails or the diagnosis of LP.
Lichen planus and Other papulosquamous disorders