Gynaecology & Obstetrics General e812b0a3 Most common mass descending mass per vaginum A Labial cyst B Vaginal cyst C Myoma D Uterovaginal prolapse High-Yield Explanation Ans. is 'd' i.e., Uterovaginal prolapseMass descending per vaginum is a common gynaecological complaint and is most often due to uterovaginal prolapse.