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
[{'content': 'Abzyme is a/an \nSelect and explain. \nA. Isoenzyme, B. Allosteric enzyme, C. Abnormal enzyme, D. Antibody with a catalytic activity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: An abzyme also called catmab is a monoclonal antibody with catalytic activity.', 'role': 'assistant'}]