This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexually transmitted diseases, Subject name: Dental
[{'content': 'Groove sign is seen in - \nSelect and explain. \nA. Donovanosis, B. LGV, C. Chancroid, D. Genital herpes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In the secondary stage of LGV when both inguinal and femoral group of lymph nodes are enlarged they are separated by inguinal ligament.( sign of groove,sign of greenblatt). From illustrated synopsis of dermatology and sexually transmitted diseases neena khanna 5th edition page no 330', 'role': 'assistant'}]