What is Erythema Multiforme, and how do you treat it?

a) Autoimmune blistering disorder; Treat with topical corticosteroids
b) Hypersensitivity reaction to medications or infections; Treat underlying cause and symptomatic relief
c) Chronic inflammatory skin condition; Treat with antifungal medications
d) Genetic disorder causing hyperpigmented skin patches; Treat with laser therapy