<prompt> Griseofulvin is not useful in one of the following:Tinea capitisTinea crurisTinea versicolorTinea pedis  <response>: Ans. C Tinea versicolorRef: CMDT -2010110Griseofulvin is used for dermatophytoses including Tinea capitis, Tinea cruris, Tinea pedis, Tinea unguum and Tinea corporis etc.Tinea versicolor is caused by a yeast Malassezia furfur. It is treated by selenium sulfide and ketoconazole shampoo. 