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: Unknown
[{'content': 'The predominant isoenzyme of LDH in the cardiac muscle is? \nSelect and explain. \nA. LDH – 1, B. LDH – 2, C. LDH – 3, D. LDH – 5', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In normal plasma LDH-2 is more in concentration than LDH – 1.\nIn myocardial infarction level of LDH – 1 increases and this leads to altered ratio of LDH.\nIt means LDH – 1 > LDH – 2.\nThis altered ratio of the LDH is known as flipped pattern.', 'role': 'assistant'}]