Answer- A- Tinea Corporis.
Dermatophytosis of the glabrous skin commonly gives rise to the annular lesions of ringworm, with a clearing, scaly center surrounded by a red advancing border that may be dry or vesicular.
The dermatophyte grows only within dead, keratinized tissue, but fungal metabolites, enzymes, and antigens diffuse through the viable layers of the epidermis to cause erythema, vesicle formation, and pruritus.
The lesions expand centrifugally and active hyphal growth is at the periphery, which is the most likely region from which to obtain material for diagnosis.
When the infection occurs in the groin area, it is called Tinea cruris, or jock itch.
Tinea manus refers to the ringworm of the hands or fingers.
Tinea capitis is dermatophytosis or ringworm of the scalp and hair