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': 'Isoform of LDH in skeletal muscles ? \nSelect and explain. \nA. LDH-1, B. LDH-2, C. LDH-3, D. LDH-4', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., LDH-4", 'role': 'assistant'}]