**Core Concept**
Intussusception is a serious medical condition where a part of the intestine telescopes into another, leading to bowel obstruction and potentially life-threatening complications. The treatment of intussusception involves reducing the telescoped segment and relieving the obstruction.

**Why the Correct Answer is Right**
The complete reduction of intussusception is achieved through air enema reduction under fluoroscopic guidance. This involves inserting a tube into the rectum and inflating air into the bowel to separate the telescoped segments. If air enema reduction is unsuccessful, surgical intervention is necessary. The goal of reduction is to restore normal bowel function and prevent long-term complications such as bowel necrosis or perforation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the correct technique for intussusception reduction. While a barium enema may be used to diagnose intussusception, it is not the primary method for reduction.
**Option B:** This option is incorrect because it does not accurately describe the complete treatment of intussusception. While surgery may be necessary in some cases, it is not the first-line treatment.
**Option C:** This option is incorrect because it does not provide a specific treatment for intussusception. A general description of reducing intussusception is not sufficient for a complete treatment.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that the management of intussusception involves a combination of diagnostic and therapeutic approaches. Prompt recognition and treatment of intussusception are critical to preventing long-term complications and improving patient outcomes.

**Correct Answer: A. Air enema reduction under fluoroscopic guidance is the primary treatment for intussusception.**