This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fungal Infection, Subject name: Skin
[{'content': 'A 16-year-old patient was recently diagnosed with HIV. Which of the following could be associated? \nSelect and explain. \nA. Distal onychomycosis, B. Proximal subungual onychomycosis, C. White superficial onychomycosis, D. Paronychia with Candida onychomycosis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B. Proximal subungual onychomycosisProximal subungual onychomycosis is an AIDS marker; nails have a characteristic white opaque appearance beginning in the region of the lunula nad extending distally under the nail plate.It's also rarest type of onychomycosis.", 'role': 'assistant'}]