171. Sphincter of Oddi 
(1) Guards the opening of common bile duct 
(2) Present at the junction of midgut and hindgut 
(3) Present between the pyloric part of stomach and duodenum 
(4) Guards the opening of hepatopancreatic duct into duodenum. 

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Please find below the solution to the asked query    
Option (4) is correct. 

"Sphincter of oddi" is a muscular valve that controls the release of bile and pancreatic digestive juices into duodenum from the ampulla of water. In simple words, it guards the opening of the hepatopancreatic duct into the duodenum.

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