This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'World Anti-TB Day is \nSelect and explain. \nA. 30th January, B. 4th february, C. 24th March, D. 1st December', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 24th of March is Observed as Anti-TB day. As this day denotes,identification of TB bacilli by Sir Robe Koch in the year 1882. Ref: Pg. No:317, IAPSM Textbook of Community Medicine', 'role': 'assistant'}]