This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
[{'content': 'Daisy head appearance of colonies of Corynebacterium diphtheria on blood tellurite agar is shown by \nSelect and explain. \nA. Gravis biotype, B. Intermedius biotype, C. Mitis biotype, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Mcleod's classification - Based on colony morphology on Tellurite medium and propeies like biochemical reactions and severity of disease, Three distinct cultural types aremitis,intermedius, andgravis GRAVIS INTERMEDIUS MITIS Colony on tellurite blood agar daisy head colony frog's egg colony poached egg colony", 'role': 'assistant'}]