This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Plague, Subject name: Social & Preventive Medicine
Pneumonic plague transmission route: 
Select and explain. 
A. Mice, B. Tick, C. Inhalation, D. Flea
C: Inhalation
Answer: C: Inhalation 
Explanation: Ans. (c) InhalationRef: K. Park 23rd ed. / 292-94* Pneumonic plague, a severe type of lung infection* It is one of three main forms of plague, all of which are caused by the bacterium Yersinia pestis.* Primary pneumonic plague results from inhalation of fine infective droplets and can be transmitted from human to human without involvement of fleas or animals.