What is the appropriate use for Lamisil AT (topical) and Lamisil (PO)?
a) Lamisil AT: Oral antifungal; Lamisil: Topical antifungal
b) Both Lamisil AT and Lamisil are used topically
c) Lamisil AT: Topical antifungal; Lamisil: Oral antifungal
d) Lamisil AT: Topical antifungal; Lamisil: Intravenous antifungal