This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
[{'content': 'Following organ/tissue have proven endocrine function/capability except \nSelect and explain. \nA. Hea, B. Adipocytes, C. Stomach, D. Salivary gland', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Salivary gland secretes only saliva all other organs has endocrine functionRef: Ganong&;s review of medical physiology; 24th edition', 'role': 'assistant'}]