This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Biochemistry
[{'content': "Keshan's disease is due to deficiency of: \nSelect and explain. \nA. Selenium, B. Zinc, C. Copper, D. Iron", 'role': 'user'}, {'content': "Answer: A \nExplanation: Keshan's Disease Deficiency of Selenium (Se) Affects: Children Women of child bearing age CLINICAL FEATURES: Cardiomyopathy Muscle weakness Hypothyroidism Eczema Increased risk of stroke Hypeension Cancer Selenium Sources- seafood and meat, nuts Deficiency - Keshan's disease Toxicity - Selenium toxicity lead to Selenosis", 'role': 'assistant'}]