This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory Infections, Subject name: Social & Preventive Medicine
True about Measles rash appearance: 
Select and explain. 
A. Along with Koplik spots, B. 1-2 days before Koplik spots, C. 1-2 days after Koplik spots, D. Post measles stage
C: 1-2 days after Koplik spots
Answer: C: 1-2 days after Koplik spots 
Explanation: RASH IN MEASLES Stas 12-24 hours after appearance of Koplik spots. Retro -auricular origin spreads to other pas of body (fades in opposite direction). Takes 1 - 2 days to cover body * Fever is highest and patient is sickest on day of rash.