Assertion (A) The direction ratios of line \(L_1\) are 2, 5, 7 and those of line \(L_2\) are \(\frac{4}{\sqrt{19}}, \frac{10}{\sqrt{19}}\), \(\frac{14}{\sqrt{19}}\). The lines \(L_1, L_2\) are parallel.Reason (R) The direction ratios of a line \(L_1\) are \(a_1, b_1, c_1\) and those of another line \(L_2\) are \(a_2, b_2, c_2\). The lines \(L_1\) and \(L_2\) are parallel if \(a_1 a_2+b_1 b_2+c_1 c_2=0\) The correct option among the following is

1. A (A) is true, \((R)\) is true and \((R)\) is the correct explanation for \((A)\).
2. B (A) is true, \((R)\) is true but \((R)\) is not the correct explanation for \((A)\).
3. C \((A)\) is true but \((R)\) is false.
4. D (A) is false but \((R)\) is true.