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If AB = BA, then prove that ABAB = `A^(2)B^(2)`. The following are the steps involved in proving the above result. Arrange them in the sequential order.
(A) ABAB =A(BA)B
(B) (AA)(BB)
(C) A(AB)B
(D) `A^(2)B^(2)`
A. ABCD
B. ACBD
C. BCAD
D. ADBC

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Correct Answer - B
The required sequential order is ACBD.

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