question_answer

The position vectors of two points P and Q are \[3\mathbf{i}+\mathbf{j}+2\mathbf{k}\] and \[\mathbf{i}-2\mathbf{j}-4\mathbf{k}\] respectively. The equation of the plane through Q and perpendicular to PQ is

A)            \[\mathbf{r}.(2\mathbf{i}+3\mathbf{j}+6\mathbf{k})=28\]

B)            \[\mathbf{r}.(2\mathbf{i}+3\mathbf{j}+6\mathbf{k})=32\]

C)            \[\mathbf{r}.(2\mathbf{i}+3\mathbf{j}+6\mathbf{k})+28=0\]

D)            None of these