A.\(AB,\,\,{C_1}{D_1},\,\,{A_1}{B_1}\)
B.\({A_1}{B_1},\,\,AB,\,\,{A_1}{D_1}\)
C.\({B_1}{C_1},\,\,AD,\,\,{A_1}{D_1}\)
D.\(AB,\,\,D{D_1},\,\,C{C_1}\)

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