This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
[{'content': 'Not a cause of community acquired pneumonia - \nSelect and explain. \nA. Acinetobacter baumanii, B. Hemophilus influenza, C. Streptococcus penumoniae, D. Mycoplasma pneumoniae', 'role': 'user'}, {'content': "Answer: A \nExplanation: Community acquired pneumonia is caused by bacteria like Streptococcus pneumoniae(most common),Mycoplasma pneumoniae(more common in young),Legionella pneumoniae,Chlamydia pneumoniae,Haemophilus infuenzae(more common in elderly),Staphylococcus aureus,Chlamydia psittaci,Coxiella Burnetii,Klebsiella pneumoniae,Actinomyces israelii.Viruses causing CAP include influenza,parainfluenza,measles,herpes simplex,adenovirus,cytomegalovirus, coronavirus. Reference:Davidson's Medicine-22nd edition,page no:683. .", 'role': 'assistant'}]