Answer :
The pancreatic acini secrete pancreatic juice, which contains digestive enzymes and bicarbonate, essential for breaking down food in the duodenum. Insulin and glucagon are secreted by the pancreatic islets, not the acini, hence the correct answer is d.
While insulin and glucagon are hormones produced by the pancreas, they are secreted by the pancreatic islets (or islets of Langerhans), not the acini. The acini are clusters of cells that form the exocrine part of the pancreas and secrete digestive substances.
Specifically, the pancreatic juice contains several digestive enzymes and bicarbonate, which help break down food and neutralize the acidity of chyme in the duodenum. The enzymes in the pancreatic juice include pancreatic amylase, which is involved in carbohydrate digestion.