This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Measles, Subject name: Social & Preventive Medicine
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: Ans. is 'd' i.e. SSPE SSPE is a rare complication of measles (~ 1 in 100,000 cases)"The most common complications are measles-associated diarrhoea, pneumonia and other respiratory complications and otitis media" - Park