In a certain code, 'DOOR' is written as 'CPPQ'. How is 'WINDOW' written? MCQ with Answer and Explanation

Each letter is shifted one place backward: W→V, I→H, N→M, D→C, O→N, W→V = VHOCPV? Wait N-1 = M, so VHOCPV? Let's compute: W-1=V, I-1=H, N-1=M, D-1=C, O-1=N, W-1=V = VHMCNV. Our option A VHOCPV is wrong. Need set correct VHMCNV. We'll adjust options.