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
Lymphogranuloma venerum is caused by - 
Select and explain. 
A. Chlamydia trachomatis, B. Calymmatobacter granulomatis, C. Haemophilus ducreyii, D. Treponema pallidum
A: Chlamydia trachomatis
Answer: A: Chlamydia trachomatis 
Explanation: Ans. is 'a' i.e., Chlamydia trachomatis