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
[{'content': 'Most common causative organism for lobar pneumonia is - \nSelect and explain. \nA. Staphylococcus aureus, B. Streptococcus pyogenes, C. Streptococcus pneumoniae, D. Haemophilus influenzae', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Streptococcus pneumoniae is the Most common causative organism for lobar pneumonia\nAdult: MC serotype associated: Type 1-8\nChildren: Type 6, 14, 19, 23 are frequently associated serotypes\nMost Virulent: Type 3.\n\nRef: Apurba Sastry’s Essentials of Medical Microbiology 1/e p233 , Ananthanarayan\xa09/e p222', 'role': 'assistant'}]