Microbiology Virology 83f02e79 Commonest complication of mumps is - A Orchitis and oophritis B Encephalitis C Pneumonia D Myocarditis High-Yield Explanation Epididymo orchitis is a complication seen in about a third of post pubeal male patients. REF:ANATHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:508