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
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 ? 
Select and explain. 
A. Treponema pallidum, B. Neisseria, C. Chlamydia trachomatis, D. H. ducreyi
C: Chlamydia trachomatis
Answer: C: Chlamydia trachomatis 
Explanation: None