**Core Concept**
Kelly's plication operation is a surgical procedure used to treat stress urinary incontinence in women. This procedure involves the creation of a plication fold in the bladder neck to increase urethral resistance and prevent involuntary urine leakage.

**Why the Correct Answer is Right**
The Kelly's plication operation involves making a small incision in the bladder neck and creating a fold or plication in the tissue to increase urethral resistance. This procedure is typically performed in women who have stress urinary incontinence, which is characterized by involuntary urine leakage during physical activities such as coughing, sneezing, or lifting. The goal of the procedure is to improve urethral closure pressure and prevent urine leakage.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the Kelly's plication operation. The procedure is specifically designed to treat stress urinary incontinence, not other types of urinary incontinence such as overflow incontinence.
**Option B:** This option is incorrect because the Kelly's plication operation is not a type of sling procedure. While sling procedures are also used to treat stress urinary incontinence, the Kelly's plication operation involves a different technique.
**Option C:** This option is incorrect because the Kelly's plication operation is not a type of artificial urinary sphincter. While artificial urinary sphincters are used to treat severe urinary incontinence, the Kelly's plication operation is a less invasive procedure.

**Clinical Pearl / High-Yield Fact**
Kelly's plication operation is a relatively simple and effective procedure for treating stress urinary incontinence in women. However, it may not be suitable for all patients, particularly those with severe urinary incontinence or other underlying medical conditions.

**Correct Answer:** B. Kelly's plication operation is done in women.