Which vitamin deficiency causes methylmalonic aciduria?: (A) Vitamin B1, (B) Vitamin B12, (C) Vitamin B6, (D) Vitamin B5
Answer is B. Ans. is 'b' i.e., Vitamin B12 * Methylmalonyl-CoA is accumulated and excreted in urine as methylmalonic acid (methylmalonate) in vitamin B12 deficiency, i.e. methylmalonic aciduria.