The correct option is D TCT
Mucus is a slimy substance, typically not miscible with water, secreted by the mucous membranes and glands of animals for lubrication, protection etc.
Trypsin is a pancreatic enzyme, acting on proteins in the intestine. Thus, it is secreted by the exocrine part of the pancreas and carried to the intestine by a common pancreatic duct.
Enterokinase, also known as enteropeptidase is an enzyme secreted by the intestinal glands.
Thyrocalcitonin (TCT) is a hormone, also called calcitonin, is secreted by the parathyroid glands which is an endocrine gland (ductless glands). so it is not carried by a duct, rather it is directly put into the bloodstream.