A ray of light emancipating from the point source \( P(1,-3,2) \) a...

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A ray of light emancipating from the point source \( P(1,-3,2) \) and travelling
\( \mathrm{P} \) parallel to the line \( \frac{x-2}{1}=\frac{y}{3}=\frac{z+1}{2} \) is incident on the plane \( x+y-3 z=0 \) at

W the point \( Q \). After reflecting from the plane the ray travels along the line \( Q R \). It is also known that the incident ray, reflected ray and the normal to the plane at the point of incidence are in the same plane.
The point \( Q \) is
(a) \( (3,15,6) \)
(b) \( (3,6,3) \)
(c) \( (-3,-6,-3) \)
(d) \( (-3,-15,-6) \)
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