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: Microbiology
Which of the following is the "Least Common" complication of measles ? 
Select and explain. 
A. Diarrhoea, B. Pneumonia, C. Otitis media, D. SSPE
D: SSPE
Answer: D: SSPE 
Explanation: None