This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
[{'content': 'A sick child laboratory test reveal low white blood count,metabolic acidosis,increased anion gap,mild hyperammonemia.Measurements of plasma amino acids reveal elevated glycine and measurement of urinary organic acids reveals increased amounts of propionic acid and methyl citrate. which of the following processes is most likely? \nSelect and explain. \nA. Glycine catabolism disorder, B. Propionic acidemia, C. A fatty acid oxidation disorder, D. Vitamin B12 deficiency', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Propionic acidemia- Block of propionyl co A carboxylase Increased propionic acid Decreased bicarbonate Increased anion gap Glycine is secondarily elevated but no catabolic defect of glycine Reference: Harpers illustrated biochemistry 30th edition', 'role': 'assistant'}]