This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fungal infections, Subject name: Dental
Seen in Pityriasis versicolor : 
Select and explain. 
A. Iris lesions, B. Auspitz sign, C. Coup D'ongle sign, D. Darrier's sign
C: Coup D'ongle sign
Answer: C: Coup D'ongle sign 
Explanation: Scraping the surface of the lesions in Pityriasis versicolor will accentuate the scaling. This sign is known as Coup D'ongle sign of Besnier (Coup D'ongle means "Stroke of nail") Iris or target lesions Erythema multiformie Bulla spread sign and Nikolsky's sign Pemphigus vulgaris. Auspitz sign Plaque psoriasis Darrier's sign Uicaria pigmentosa. White dermographism Atopic dermatitis. Dimple sign Dermatofibroma.