This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
[{'content': 'Glucagon receptors are NOT found in which organ: \nSelect and explain. \nA. Cornea, B. Kidney, C. Stomach, D. Adrenal gland', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (a) CorneaRef: Harper's Biochemistry, 30 edn. pg. 140th* Glucagon receptors are mainly expressed in liver and in kidney with lesser amounts found in heart, adipose tissue, spleen, thymus, adrenal glands, pancreas, cerebral cortex, and gastrointestinal tract.", 'role': 'assistant'}]