A 3-month-old male infant developed otitis media for which he was given a course of Co-trimoxazole. A few days later, he developed extensive peeling of the skin; there were no mucosal lesions and the baby was not toxic. The most likely diagnosis is?
a. Toxic epidermal necrolysis
b. Staphylococcal scalded skin syndrome
c. Steven Johnson syndrome
d. Infantile pemphigus