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: Medicine
[{'content': 'The most common causative organism for lobar pneumonia is : \nSelect and explain. \nA. Staphylococcus aureus, B. Streptococcus pyogenes, C. Streptococcus pheumoniae, D. Haemophilus influenzae', 'role': 'user'}, {'content': "Answer: C \nExplanation: Answer is C (Stretptococcus pneumonia): 'Streptococcus pneumonia or pneumococcus is the most common cause of community acquired acute pneumonia -Robbins 7th/748 Lobar pneumonia refers to an acute bacterial infection that results in consolidation of a large poion of a lobe or an entire lobe. Streptococcus pneumonia produces a picture of lobar pneumonia.", 'role': 'assistant'}]