This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Streptococci, Subject name: Microbiology
[{'content': 'Most common organism causing URT1 in adult- \nSelect and explain. \nA. H influenza, B. Stap aureus, C. Strepto pneumonia, D. Streptococcus pyogenes', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Streptococcus pyogenes o Most common cause of upper respiratory'' tract infection is viral infection. Rhinovirus is the most common cause,o Among the bacteria, group A beta-hemolytic streptococci (streptococcus pyogenes) is the most common cause. And most common type of infection is phary ngitis.", 'role': 'assistant'}]