<prompt> Fungicidal drug used orally for treatment of onychomycosisAmphotericin BClotrimozaleTerbinafateGresiofulvin  <response>: Onychomycosis is a fungal infection of the nail causing yellow discoloration of the nail usually caused by a dermatophyte .Among the given drugs only terbinafine given orally. AMB given iv or lipososmal form. Ref:KDT 6e 765 