This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Forcheimer sign is seen in 
Select and explain. 
A. Infectious monocucleosis, B. Scarlet fever, C. Rubella, D. Rubeola
C: Rubella
Answer: C: Rubella 
Explanation: None