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: Microbiology
8 Year old boy presented with swelling on both
sides of the face, below the ears of 4 days duration.
It first started on the left side and then 3 days later on the right side

Cause for the disease will be 
Select and explain. 
A. Herpes simplex virus, B. Cytomegalo virus, C. Paramyxo virus, D. Hepatitis c virus
C: Paramyxo virus
Answer: C: Paramyxo virus 
Explanation: None