Coenzyme for methylmalonyl-CoA isomerase: (A) Biotin, (B) Cobalamine, (C) Thiamine, (D) Niacine
Answer is B. Methylmalonyl-CoA mutase is a vitamin B12- dependent enzyme, and in deficiency methylmalonic acid is excreted in the urine (methylmalonic aciduria).Ref: Harpers Illustrated Biochemistry, 30th edition, page no: 187