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
[{'content': 'KLB is another name for \nSelect and explain. \nA. Corynebacterium diphtheria, B. Corynebacterium pseudodiphtheriae, C. Corynebacterium tetani, D. Anthrax', 'role': 'user'}, {'content': "Answer: A \nExplanation: Diphtheria bacilli were first observed and described by Klebs in 1883 and first cultivated by Loeffler in 1884 - hence called Klebs- Loeffler's bacilli or KLB. Reference: Textbook of Microbiology; Anathanarayan and panicker's; 10th edition; Page no: 239", 'role': 'assistant'}]