If\(\vec{L}=\left( 5\hat{j}+7\hat{k} \right)\) and \(\vec{M}=\left( 2\hat{i}-7\hat{j}+5\hat{k} \right)\) then, the dot product of \({\vec{P}}\) and  \({\vec{Q}}\) gives

1
3 units
2
7 units
3
5 units
4
0

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