This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Microbiology
[{'content': 'A 28-year-old sexually active male presents with burning micturition. On clinical examination, there is 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. Hemophilus ducreyi', 'role': 'user'}, {'content': 'Answer: C \nExplanation: commonly known as chlamydia,is a bacterium that causes chlamydia, which can manifest in various ways, including: trachoma, lymphogranuloma venereum, nongonococcal urethritis, cervicitis, salpingitis, pelvic inflammatory disease. C. trachomatis is the most common infectious cause of blindness and the most common sexually transmitted bacterium.', 'role': 'assistant'}]