Answer :
The correct answer is 2) sphincter of Oddi. The opening into the duodenum for pancreatic juices and bile is called the sphincter of Oddi, which plays a critical role in the digestion process within the small intestine.
The opening into the duodenum allowing for entry of pancreatic juices and bile is called the sphincter of Oddi. This sphincter also known as the hepatopancreatic sphincter, regulates the flow of both bile and pancreatic juice into the duodenum. The bile is produced in the liver, stored and concentrated in the gallbladder, and contains bile salts which help emulsify lipids, while the pancreas produces enzymes that break down starches, disaccharides, proteins, and fats into glucose, triglycerides, and amino acids.
This flow of digestive juices into the duodenum is crucial for the digestion and absorption processes that take place within the small intestine. The correct answer is 2) sphincter of Oddi.