This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Selenium deficiency causes 
Select and explain. 
A. Cardiomyopathy, B. Neuropathy, C. Growth retardation, D. Rhabdomyolysis
A: Cardiomyopathy
Answer: A: Cardiomyopathy 
Explanation: (A) Cardiomyopathy DEFICIENCIES OF METALSElementDeficiencyBoronNo biologic function determinedCalciumReduced bone mass, osteoporosisCopperAnemia, growth retardation, defective keratinization and pigmentation of hair, hypothermia, degenerative changes in aortic elastin, osteopenia, mental deteriorationChromiumImpaired glucose toleranceFluorideDental cariesIodineThyroid enlargement, T4, cretinismIronMuscle abnormalities, kilonychia, pica, anemia, work performance, impaired cognitive development, premature labor, perinatal maternal mortalityManganeseImpaired growth and skeletal development, reproduction, lipid and carbohydrate metabolism; upper body rashMolybdenumSevere neurologic abnormalitiesSeleniumCardiomyopathy, heart failure, striated muscle degenerationPhosphorousRickets (osteomalacia), proximal muscle weakness, rhabdomyolysis, paresthesia, ataxia, seizure, confusion, heart failure, hemolysis, acidosisZincGrowth retardation, taste and smell, alopecia, dermatitis, diarrhea, immune dysfunction, failure to thrive, gonadal atrophy, congenital malformations