**Core Concept**
Fohergill's repair, also known as the Manchester operation, is a surgical procedure used to correct uterine prolapse, where the uterus slips out of its normal position. This condition is often associated with pelvic organ prolapse, which can lead to various complications, including urinary incontinence and vaginal discharge.

**Why the Correct Answer is Right**
The Manchester operation is a type of colpocleisis, a surgical technique that involves closing the vaginal entrance to treat prolapse. This procedure is typically performed in postmenopausal women who have significant prolapse and are not good candidates for more extensive surgery. The operation involves amputation of the cervix and closure of the vaginal entrance, which helps to eliminate symptoms of prolapse and improve quality of life.

**Why Each Wrong Option is Incorrect**
**Option A:** Khanna's sling operation is not a known procedure for treating uterine prolapse, making it an incorrect choice.

**Option C:** Le Fort's repair is actually a type of cesarean delivery, not a procedure for treating prolapse, so it is not the correct answer.

**Option D:** Shirodkar's abdominal sling operation is a different surgical technique used to treat uterine prolapse, but it is not the same as the Manchester operation.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the choice of surgical procedure for treating uterine prolapse depends on the patient's age, medical history, and overall health. The Manchester operation is often recommended for postmenopausal women who have significant prolapse and are not good candidates for more extensive surgery.

**✓ Correct Answer: B. Manchester operation**