A 23-year-old woman complains of headaches and arthralgias for the past 3 days. She presents to urgent care because of a painful rash on her face that has progressed into multiple vesicles. This rash is characterized by erythematous macules with dark purple centers with multiple vesicles in different stages. On physical exam there is also mucosal edema within the oral cavity. She recently completed an antibiotic course for a urinary tract infection. Which of the following is the most likely diagnosis?
a. Erythema multiforme
b. Staphylcoccal scalded skin syndrome
c. Stevens-Johnson syndrome
d. Toxic epidermal necrolysis

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