A straight line drawn from the point \( (1,3,2) \), \( P \) parallel to the line \( \dfrac{x-2}{1}=\dfrac{y-4}{2}=\dfrac{z-6}{1} \) intersects the plane \( L_1: x-y+3z=6 \) at the point \( Q \). Another straight line which passes through \( Q \) and is perpendicular to the plane \( L_1 \) intersects the plane \( L_2: 2x-y+z=-4 \) at the point \( R \). Then which of the following statements is (are) TRUE?
