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: Gynaecology & Obstetrics
Lymphogranuloma venerum is characterised by all except 
Select and explain. 
A. Primary lesions heal without scarring, B. Commonly develop systemic infection, C. Metronidazole is effective treatment, D. Groove sign is seen characteristically
C: Metronidazole is effective treatment
Answer: C: Metronidazole is effective treatment 
Explanation: Doxycycline or erythromycin is used for treatment of LGV.