The correct option is B Ductless glands in pancreas
Pancreas is a compound gland. In addition to secreting digestive enzymes, the pancreas is an important endocrine gland. Its hormones, insulin and glucagon, are secreted by cells, that occur in little clusters, the islets of Langerhans, throughout the pancreas. About 1 million islets are present in the human pancreas. They consist mainly of beta cells, which secrete insulin, and alpha cells, which secrete glucagon.