The correct option is D Cholecystokinin and secretin
Cholecystokinin (CCK) and secretin are the peptide hormones that stimulate the production of pancreatic juice and bicarbonates within the alimentary canal.
Secretin acts on the exocrine pancreas and stimulates the secretion of water and bicarbonate ions. CCK acts on both pancreas and gall bladder and stimulates the secretion of pancreatic enzymes and bile juice respectively.
So, the correct answer is 'Cholecystokinin and secretin'