<prompt> Koplik spots are characteristic of:-Chicken poxMumpsHIVMeasles  <response>: 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. 