问题：
[单选题]患者，男，72岁，因持续性胸痛6小时入院，查体双肺底有少量湿啰音，诊断为急性心肌梗死。该患者心功能分级为（ ）。
A、NYHA分级Ⅲ级
B、NYHA分级Ⅳ级
C、NYHA分级Ⅱ级
D、Killip分级Ⅱ级
E、Killip分级Ⅲ级
参考答案：
D
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