This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Most common viral disease affecting parotid glands - 
Select and explain. 
A. Mumps, B. Measles, C. Rubella, D. Varicella
A: Mumps
Answer: A: Mumps 
Explanation: an acute infection commonly affecting children and characterised by non suppurative enlargement of parotid gland REF:ANANTHANARYANAN TEXT BOOK OF MICROBIOLOGY 9EDITION PGNO.507