For which value of x will the matrix given below become...

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For which value of x will the matrix given below become singular?
\[\left[ {\begin{array}{*{20}{c}} 8&{\text{x}}&0 \\ 4&0&2 \\ {12}&6&0 \end{array}} \right]\]

A. 4

B. 6

C. 8

D. 12

Answer: Option A

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