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
Mycobacterium tuberculosis infection in human is most commonly because of - 
Select and explain. 
A. Contact, B. Inhalation, C. Infiltration, D. Inoculation
B: Inhalation
Answer: B: Inhalation 
Explanation: 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