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
Koplik spots are characteristic of:- 
Select and explain. 
A. Chicken pox, B. Mumps, C. HIV, D. Measles
D: Measles
Answer: D: Measles 
Explanation: Koplik spots - pathognomic feature of Measles. Retro auricular origin - Rash in measles. lower 2nd molar on Buccal mucosa. - Pathognomic feature of Rabies is hydrophobia. - Pathognomic feature of Diphtheria is bull neck.