This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Skin
[{'content': 'A young man presents with asymptomatic macules and erythematous painless lesion over glans with generalised lymphadenopathy. Treatment of choice in this condition: \nSelect and explain. \nA. Ceftriaxone, B. Benzathine penicillin, C. Acyclovir, D. Fluconazole', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Benzathine penicillin', 'role': 'assistant'}]