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
Orotic aciduria is due to deficiency of ? 
Select and explain. 
A. Decarboxylase, B. Tyrosinase, C. Isomerase, D. Homogentisate oxidase
A: Decarboxylase
Answer: A: Decarboxylase 
Explanation: Ans. is 'a' i.e., Decarboxylase Metabolic disease Enzyme deficient Maple syrup urine disease Branched chain ketoacid dehydrogenase Methyl-melonic aciduria Methyl-malonyl CoA mutase (isomerase) Isovaleryl-CoA dehydrogenase Sweaty feet odor in body Tyrosinemia I (Tyrosinosis) Fumarylacetoacetate hydroxylase Tyrosinemia II Tyrosine transaminase (Tyrosine aminotransferase) Neonatal tyrosinemia Hydroxyphenyl pyruvate hydroxylase Albinism Tyrosinase Alkaptonuria Homogentisate oxidase Phenylketonuria Phenylalanine hydroxylase Orotic aciduria Homocystinuria Lesh-Nyhan syndrome Cystinosis OMP decarboxylase Cystathionine synthatase Complete deficiency of enzyme HGP Cystine reductase