In urea cycle which defect is an X linkeddisease?

In urea cycle which defect is an X
linkeddisease ?
a) Ornithine transcarbamylase
b) Aspartate transcarbamylase
c) Arginase
d) Argininosuccinate synthase
Correct Answer - A
Ans. is ‘a’ i.e., Ornithine transcarbamylase