This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition & Digestion, Subject name: Biochemistry
Cardiomyopathy is due to deficiency of: 
Select and explain. 
A. Selenium, B. Phosphorus, C. Boron, D. Zinc
A: Selenium
Answer: A: Selenium 
Explanation: Ans. A. SeleniumNutritional Causes of Cardiomyopathy are:Deficiency of thiamine, selenium, calcium and magnesium.Excess of iron (Hemochromatosis)