This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
Trachoma is caused by which of the following serotypes of chlamydia 
Select and explain. 
A. D - K, B. L1- L3, C. L5 - L7, D. A, B,Ba, C
D: A, B,Ba, C
Answer: D: A, B,Ba, C 
Explanation: CHLAMYDIAE TRACHOMATIS causative agent of endemic blinding trachoma which is a chronic keratoconjunctivitis characterised by follicular hyperophy,papillary hyperplasia,pannus formation and in late stages,cicatrisation caused by A,B,Ba,C, serotypes of C.trachomatis whereas serotypesD_K cause other diseases like inclusion conjunctivitis,genital chlamydiasis,infant pneumonia Ref:Ananthanarayan and paniker's microbiology 10th edition