This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology Pa 1 (Gram Positive Cocci, Gram Negative Cocci), Subject name: Microbiology
[{'content': 'C-carbohydrate in Streptococcus hemolyticus is impoant for- \nSelect and explain. \nA. Lancefield classification, B. Phagocytic inhibition, C. Toxin production, D. Haemolysis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Option 1- Hemolytic streptococci are classified by Lancefield serological classification into groups based on nature of 'C' Option 2 - C-Carbohydrate antigen doesn't have any anti-phagocytic role. Option 3- C-Carbohydrate antigen doesn't have any correlation with toxin production. Option 4- On the basis of hemolysis, streptococci can be divided into 3 groups:- a Hemolytic, b Hemolytic, g Hemolytic", 'role': 'assistant'}]