This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Koplik spots is a feature of - 
Select and explain. 
A. Rubella, B. Measles, C. Tetanus, D. Mumps
B: Measles
Answer: B: Measles 
Explanation: Presence of Koplik&;s spot is pathognomic of measles. They are like table salt crystals appear on buccal mucosa opposite the first and second lower molars. Ref: PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition pg 147