心肌梗死时,血清中下列哪项的活性升高

A、LDH[img=~\/QImg\/2013-06-26-17-11-54\/image001.gif]
B、LDH[img=~\/QImg\/2013-06-26-17-11-54\/image002.gif]
C、LDH[img=~\/QImg\/2013-06-26-17-11-54\/image021.gif]
D、LDH[img=~\/QImg\/2013-06-26-17-11-54\/image022.gif]
E、LDH[img=~\/QImg\/2013-06-26-17-11-54\/image023.gif]