Identify the structure marked as F, G, H, I and also state about the formation of the structure marked as H and mention the alphabet of the structure guarded by the sphincter of Oddi in order in the picture :

Question

( a ) pancreas, common hepato-pancreatic duct, pancreatic duct, duodenum. The bile duct and the pancreatic duct open together into the duodenum as the common hepato-pancreatic duct. sphincter of Oddi guards (G)
( b ) pancreas, common hepato-pancreatic duct, pancreatic duct, duodenum. The bile duct and the pancreatic duct open together into the duodenum as the common hepato-pancreatic duct. sphincter of Oddi guards (I)
( c ) pancreas, common hepato-pancreatic duct, pancreatic duct, duodenum. The bile duct and the pancreatic duct open together into the duodenum as the common hepato-pancreatic duct. sphincter of Oddi guards (H)
( d ) pancreas, pancreatic duct, common hepato-pancreatic duct, duodenum. The bile duct and the pancreatic duct open together into the duodenum as the common hepato-pancreatic duct. sphincter of Oddi guards (H)