This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
Deficiency of arginosuccinate synthase causes- 
Select and explain. 
A. Citrullinemia, B. Hyperargininemia, C. Argininosuccinic aciduria, D. Type I hyperammonemia
A: Citrullinemia
Answer: A: Citrullinemia 
Explanation: Ans. is 'a' i.e., CitrullinemiaDisorders caused by genetic defects of urea cycle enzymesDisordersDefective enzymeProducts accumulatedHyperammonemia type-ICarbamoyl phosphate synthase-IAmmoniaHyperammonemia type-IIOrnithine transcarbamoylaseAmmoniaCitrullinemiaArgininosuccinate synthaseCitrullineArgininosuccinic aciduriaArgininosuccinate lyaseArgininosuccinateArgininemiaArginaseArginine