81. Which of the following abbreviations is not a correct mnemonic code for the meaning behind the abbreviation?
(A) OB-GYN: Department of Obstetrics and Gynecology.
(B) OR: Department of Surgery
(C) CAR: Department of Cardiology
(D) ENT: Department of Ear, Nose, Throat

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統計： A(1), B(9), C(6), D(3), E(0) #924644