A 36 years old factory worker developed itchy annular scaly plaques in both groins. Application of a corticosteroid ointment led to temporary relief but the plaques continued to extend at the periphery.The most likely diagnosis is –
In this question :-


Annular lesion in groins
Scaly
Itching
Extending peripherially


All suggest the diagnosis of dermatophyte infection.
Dermatophyte infection of groin is known as T. cruris.
Erythema annulare centrifugam
Granuloma annulare
Annular lichen planus
Tenia cruris