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: Social & Preventive Medicine
Which form of plague can spread from person to person? 
Select and explain. 
A. Bubonic plague, B. Pneumonic plague, C. Septicaemic plague, D. None of the above.
B: Pneumonic plague
Answer: B: Pneumonic plague 
Explanation: In cases of bubonic plague, bacilli are locked up within the lymph nodes and are not infective. Pneumonic plague is highly infectious and spreads from person to person through droplet method. Ref: Park 21st edition: page 270.