**Core Concept**
Annular pancreas is a rare congenital anomaly where pancreatic tissue surrounds the second part of the duodenum, potentially causing duodenal obstruction. Surgical intervention is required to relieve the obstruction and restore normal duodenal function.

**Why the Correct Answer is Right**
Duodenoduodenostomy is the preferred surgical procedure for treating annular pancreas. This procedure involves creating a direct connection between the proximal and distal segments of the duodenum, bypassing the pancreatic tissue that encircles the second part of the duodenum. This approach ensures a wide, tension-free anastomosis, minimizing the risk of complications and facilitating normal duodenal emptying.

**Why Each Wrong Option is Incorrect**
**Option A:** Division of pancreas - This approach may not completely relieve the obstruction and may lead to pancreatic fistula or other complications. Pancreatic tissue surrounding the duodenum is usually preserved to maintain pancreatic function.

**Option C:** Duodenojejunostomy - While this procedure can bypass the obstruction, it may not provide the best long-term results, as it involves creating a loop of jejunum to bypass the duodenum. This may lead to complications such as bowel obstruction or poor nutrition.

**Option D:** Roux-en-Y loop - This procedure involves creating a loop of intestine to bypass the obstruction, but it is generally reserved for more complex cases where a direct duodenoduodenostomy is not feasible. It may not provide the best results in cases of annular pancreas.

**Clinical Pearl / High-Yield Fact**
Annular pancreas can be associated with other congenital anomalies, such as Down syndrome, and may present with symptoms such as abdominal pain, vomiting, and weight loss. A high index of suspicion and early surgical intervention are essential to prevent long-term complications.

**Correct Answer:**
✓ Correct Answer: B. Duodenoduodenostomy