1.

The line of intersection of the planes \[\mathbf{r}.(\mathbf{i}-3\mathbf{j}+\mathbf{k})=1\] and \[\mathbf{r}.(2\mathbf{i}+5\mathbf{j}-3\mathbf{k})=2\] is parallel to the vector 

A.            \[-4\mathbf{i}+5\mathbf{j}+11\mathbf{k}\]
B.            \[4\mathbf{i}+5\mathbf{j}+11\mathbf{k}\]
C.            \[4\mathbf{i}-5\mathbf{j}+11\mathbf{k}\]
D.            \[4\mathbf{i}-5\mathbf{j}-11\mathbf{k}\]
Answer» C.            \[4\mathbf{i}-5\mathbf{j}+11\mathbf{k}\]


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