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
Which is the enzyme deficient in Tyrosinemia type I 
Select and explain. 
A. Tyrosine Transainase, B. CPS - I, C. Fumaryl aceto acetate hydrolase, D. Arginosuccinate synthetase
C: Fumaryl aceto acetate hydrolase
Answer: C: Fumaryl aceto acetate hydrolase 
Explanation: Option A): Tyrosinemia Type II
Option B): Hyperammonemia type I
Option D): Cirtrullinemia type I