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
What is the commonest form of plague? 
Select and explain. 
A. Bubonic plague, B. Pneumonic plague, C. Septicaemic plague, D. Hemorrhagic plague
A: Bubonic plague
Answer: A: Bubonic plague 
Explanation: The commonest form of plague is bubonic plague. Pneumonic plague occurs in less than 5% of patients. Septicaemic plague occurs rarely except for accidental laboratory infections. Ref: Park 21st edition, page 270.