单项选择题

检索内镜超声和逆行胰胆管造影在慢性胰腺炎中诊断价值的文献，正确的检索表达式是
A、（内镜超声 AND 逆行胰胆管造影） AND 慢性胰腺炎 AND 诊断
B、（内镜超声 OR 逆行胰胆管造影） AND 慢性胰腺炎 AND 诊断
C、（内镜超声 AND 慢性胰腺炎 OR 逆行胰胆管造影 AND 诊断
D、内镜超声和逆行胰胆管造影在慢性胰腺炎中诊断

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单项选择题

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