Sphincter of Oddi guards the opening of hepatopancreatic duct in duodenum.

Answer

### Step-by-Step Solution:

1. **Understanding the Sphincter of Oddi**: The Sphincter of Oddi is a muscular valve located at the junction where the bile duct and pancreatic duct open into the duodenum. Its primary function is to regulate the flow of bile and pancreatic juices into the small intestine.

2. **Identifying the Ducts**: The hepatopancreatic duct is formed by the convergence of the bile duct (from the liver) and the pancreatic duct (from the pancreas). This duct is crucial for digestion as it carries bile and pancreatic enzymes into the duodenum.

3. **Function of the Sphincter of Oddi**: The Sphincter of Oddi remains closed most of the time, preventing the backflow of bile and pancreatic juices. It opens in response to the presence of food in the stomach, allowing these digestive juices to enter the duodenum and aid in digestion.

4. **Conclusion**: The statement "Sphincter of Oddi guards the opening of hepatopancreatic duct in duodenum" is correct. The Sphincter of Oddi indeed controls the entry of bile and pancreatic juices into the duodenum through the hepatopancreatic duct.