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
Transfer of the carbamoyl moiety of carbamoyl phosphate to ornithine is catalysed by a liver mitochondrial enzyme: 
Select and explain. 
A. Carbamoyl phosphate synthetase, B. Ornithine transcarbamoylase, C. N-acetyl glutamate synthetase, D. N-acetyl glutamate hydrolase
B: Ornithine transcarbamoylase
Answer: B: Ornithine transcarbamoylase 
Explanation: The carbamoyl group is transferred to the NH2 group of ornithine by ornithine transcarbamoylase (OTC).
Reference: Vasudevan 7th  ed, pg 204