In human being sphincter of Oddi is situated in `:-`

Options

A. Common bile duct
B. Ampulla of vater
C. Main pancreating duct
D. Common hepatic duct

Answer

**Step-by-Step Solution:**

1. **Understanding the Sphincter of Oddi**: The Sphincter of Oddi is a muscular valve that controls the flow of digestive juices (bile and pancreatic juice) into the small intestine.

2. **Identifying its Location**: The Sphincter of Oddi is located at the junction where the common bile duct and the main pancreatic duct empty into the duodenum, specifically at the ampulla of Vater.

3. **Analyzing the Options**:
- **Option 1: Common Bile Duct** - This duct carries bile from the liver and gallbladder but does not contain the Sphincter of Oddi.
- **Option 2: Ampulla of Vater** - This is the correct location where the Sphincter of Oddi is situated as it regulates the flow of bile and pancreatic juice into the duodenum.
- **Option 3: Main Pancreatic Duct** - This duct carries pancreatic juices but is not where the Sphincter of Oddi is located.
- **Option 4: Common Hepatic Duct** - This duct carries bile from the liver and does not contain the Sphincter of Oddi.

4. **Conclusion**: Based on the analysis, the Sphincter of Oddi is situated in the ampulla of Vater.

**Final Answer**: The Sphincter of Oddi is situated in the **Ampulla of Vater** (Option 2).

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