21. 此圖片為矯正病人口內右邊頰側照片，此咬合異常屬於：
(A)Angle Class I malocclusion
(B)Angle Class II division 1 malocclusion
(C)Angle Class II division 2 malocclusion
(D)Angle Class III malocclusion

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統計： A(189), B(1), C(5), D(34), E(0) #1035512