All are diseases of skin except
(A) Erythema multiforme (B) Keratosis folticularis (C) Erythema migrans (D) Psoriasis form lesion
(C) Option 'C' erythema migrans is other name of ectopic geographic tongue / annulus migrans in which lesions are not always restricted to the tongue, and similar irregular or circinate lesions occurring elsewhere in the oral cavity.