Which one of the following pairs is the matching pair of the part and the hormone it secretes?

Thyroxine hormone is secreted by thyroid hormone while epinephrine is the hormone secreted by the adrenal medulla. Alpha cells of islets produce and secrete glucagon hormone which increases the blood glucose level by promoting glycogenolysis. Secretin is secreted by endocrine cells of the duodenal wall in response to the presence of hydrochloric acid in the chyme. So, the correct answer is option B.