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 38 year old male presents to the OPD with swelling in the inguinal region. On examination inguinal nodes are enlarged along with multiple discharging sinuses from the enlarged lymphnodes. What is the most probable diagnosis? \nSelect and explain. \nA. Chancroid, B. LGV, C. Syphilis, D. Granuloma inguinale', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Patient in the question is most likely suffering from Lymphogranuloma venerum caused by Chlamydia trachomatis (L1, 2, 3). It is associated with sign of groove when both inguinal and femoral lymph nodes are enlarged and are separated by the inguinal ligament. Ref: Illustrated Synopsis of Dermatology and Sexually Transmitted Diseases By Neena Khanna 2e page 262.', 'role': 'assistant'}]