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: Microbiology
[{'content': 'A 28 year old sexually active male presents with burning micturation. On clinical examination no ulcer in the genitals. Urine examination shows 50 WBCs/HPF, no RBCs, leucocyte esterase positive, gonococcal culture negative. What could be the most probable causative organism ? \nSelect and explain. \nA. Treponema pallidum, B. Neisseria, C. Chlamydia trachomatis, D. H. ducreyi', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]