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 complications of Mumps is 
Select and explain. 
A. Orchitis and Oophoritis, B. Encephalitis, C. Pneumonia, D. Myocarditis
A: Orchitis and Oophoritis
Answer: A: Orchitis and Oophoritis 
Explanation: At least one-third of all mumps infections are subclinical, including the majority of infections in children younger than 2 years. The most characteristic feature of symptomatic cases is swelling of the salivary glands, which occurs in about 50% of patientsThe testes and ovaries may be affected, especially after pubey. Around 20-50% of men who are infected with mumps virus develop orchitis (often unilateral).Jawetz 27e pg: 589