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
The hydrolytic step leading to release of polypeptide chain from ribosomes in catalysed by: 
Select and explain. 
A. Stop codons, B. Pepitidyl transferase, C. AUG codon, D. All
B: Pepitidyl transferase
Answer: B: Pepitidyl transferase 
Explanation: B i.e. Peptidyl transferase;