mrcp part 1 MCQ (SBA): Erythema Multiforme Major / SJS

A 30-year-old man presents with a 2-day history of painful, tense blisters on his hands and feet, as well as target lesions (dusky centre, pale oedematous ring, erythematous halo) on his palms and extensor surfaces. He also has ulceration on his lips and conjunctivitis. He recently had an episode of genital herpes. What is the most likely diagnosis?