78.圖中黑色箭頭所指的病變,最可能為下列何者? (A)殘餘囊腫(residual cyst) (B)根尖囊腫(radicular cyst) (C)根尖牙骨質骨質發育不良症(periapical cemento-osseous dysplasia) (D)外生贅骨(exostoses)