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
Incubatory carrier seen in -a)  Cholerab)  Bubonic plaguec)  Mumpsd)  Measles e)  Influenza 
Select and explain. 
A. ba, B. aec, C. cde, D. ce
C: cde
Answer: C: cde 
Explanation: None