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: Pharmacology
[{'content': 'A patient on antitubercular treatment shows sputum positivity at the end of intensive phase under category I. Next step would be : March 2009 \nSelect and explain. \nA. Continue treatment of IP for one more month, B. Switch to category II treatment, C. Resta category I treatment, D. Sta continuation phase under category I', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Continue treatment of IP for one more month', 'role': 'assistant'}]