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: Medicine
True about measles is all except: 
Select and explain. 
A. Measles shows a Cyclical trend, B. Koplik spots seen on buccal mucosa opposite upper 2nd molar, C. Incubation period is 10-14 days, D. SAR is 80%
B: Koplik spots seen on buccal mucosa opposite upper 2nd molar
Answer: B: Koplik spots seen on buccal mucosa opposite upper 2nd molar 
Explanation: Koplik spots seen opposite lower 2nd molar.