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
Isoform of LDH in skeletal muscles ? 
Select and explain. 
A. LDH-1, B. LDH-2, C. LDH-3, D. LDH-4
D: LDH-4
Answer: D: LDH-4 
Explanation: Ans. is 'd' i.e., LDH-4