Concept:A mixed gland is one that performs both endocrine and exocrine functions, secreting hormones into the blood and other substances through ducts.
Explanation:Endocrine glands release hormones directly into the bloodstream.
Exocrine glands release their products through ducts.
A mixed gland therefore combines both of these actions.
The pancreas is an example because it secretes insulin and glucagon as hormones.
It also produces digestive enzymes such as trypsin and amylase.
These digestive enzymes pass through the pancreatic duct into the small intestine.
This shows the pancreas has both endocrine and exocrine roles.
The pituitary, adrenal, and thyroid glands are purely endocrine.
Only the pancreas among the given options is a mixed gland.
Answer:C. Pancreas