A) \[(AB{)}'={A}'{B}'\]
B) \[(AB{)}'={B}'{A}'\]
C) \[AB=O;\]If \[|A|\,=0\]or \[|B|\,=0\]
D) \[AB=O;\text{If}\,\,A=I\,\,\text{or }B=I\]
Correct Answer: B
Solution :
It is obvious.
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