This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumours of skin, Subject name: Dental
A 59-year-old woman complains of skin lesion shown below catches on her clothing. It has been present for several years and is not associated with any other symptoms. What is the single most likely diagnosis? 
Select and explain. 
A. Dermatofibroma, B. Fibroepithelial polyp, C. Keratoacanthoma, D. Nodular basal cell carcinoma
B: Fibroepithelial polyp
Answer: B: Fibroepithelial polyp 
Explanation: Fibroepithelial polyp (Skin tag; Papilloma; Acrochordon) Seen at sites of chafing such as the groin, axilla or neck. Benign and typically have a narrow stalk Most cases are idiopathic but occasionally associated with insulin resistance. Hanging or protruding polyps Dermatofibromas are seen on legs or arms and are within the skin. Keratoacanthomas have central plug of keratin.