51. Which of the following statements about diseases associated with mitochondrial gene mutations and affected electron transport chain complexes are incorrect? (A) Leigh Syndrome causes difficulty swallowing and decreased motor abilities→only complex I (B) Hypertrophic cardiomyopathy results in cardiac enlargement and degeneration→ only complex III and IV (C) Pearson Syndrome leads to sideroblastic anemia → only complex I and IV (D) Kearns-Sayre syndrome causes ophthalmoplegia and ragged red fibers →only complex I and IV and IV