Patient suffering from lesions over axilla, groin and trunk. Lesions show central clearing with surrounding papulovesicular margin progressively increasing at borders. Which will be the preferred investigation among the following?: (A) Wood's lamp examination, (B) 10% KOH mount, (C) Skin biopsy, (D) Patch testing
Answer is B. Ans. b. 10% KOH mountExplanation: Central clearing is associated with tinea corporis (dermatophytic fungal infection). So, answer will be KOH mount.