A) 20
B) 10
C) 0
D) 250
Correct Answer: C
Solution :
\[\left| \,\begin{matrix} 1 & 2 & 3 \\ 3 & 5 & 7 \\ 8 & 14 & 20 \\ \end{matrix}\, \right|=2-8+6=0\].
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