This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Uronic acid level in urine is elevated in- 
Select and explain. 
A. Tyrosinosis, B. Maple syrup urine disease, C. Nieman picks disease, D. mucopolysaccharidosis
D: mucopolysaccharidosis
Answer: D: mucopolysaccharidosis 
Explanation: Uronic acid (glucuronic acid) is one of the essential components of mucopolysaccharide (glycosaminoglycans). So, it is increased in mucopolysaccharidosis.
In mucopolysaccharidosis, glucuronic acid and iduronic acid are excreted in urine.