This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Haemophilus, Yersinia, Spirochaetes, Ricketssia, Chlamydia, Mycoplasma and Miscellaneous Bacteria), Subject name: Microbiology
[{'content': 'Which of the following is a not member of HACEK group- \nSelect and explain. \nA. Hemophilus aphrophilus, B. Acinetobacter, C. Cardiobacterium, D. Kingella', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The HACEK groupinclude -Hemophilus parainfluenzae, Hemophilus aphrophilus, Actinobacillus (now Aggregatibacter) actinomycecomitans, Cardiobacterium hominis, Eikinella corrodens and Kingella kingae. These are gram negative pleomorphic bacilli which are capnophilic and have fastidious growth requirements. They do not grow on MacConkey and on blood agar, their colonies appear in 2-3 days. They are normal commensals of the oral cavity which can cause endocarditis following dental manipulations.', 'role': 'assistant'}]