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': 'Mycobacterium tuberculosis infection in human is most commonly because of - \nSelect and explain. \nA. Contact, B. Inhalation, C. Infiltration, D. Inoculation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tuberculosis is transmitted mainly by droplet infection and droplet nuclei generated by sputum positive patients with pulmonary tuberculosis . Ref:PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page :181', 'role': 'assistant'}]