This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Minerals, Subject name: Biochemistry
[{'content': 'Impaired Glucose intolerance is caused by deficiency of \nSelect and explain. \nA. Chromium, B. Selenium, C. Copper, D. Cobalt', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) ChromiumRef: Harrisons, 19th ed. pg. 96e-9* A deficiency of chromium can cause impaired glucose tolerance.* Physiologically, chromium potentiates the action of insulin in patients with impaired glucose tolerance, presumably by increasing insulin receptor-mediated signaling.* Rich food sources of chromium include yeast, meat, and grain products.* Note:# Deficiency of Selenium: Can cause cardiomyopathy (Keshan disease)# Selenium toxicity: Can cause selenosis (Kashinbeck disease)', 'role': 'assistant'}]