The equation of the plane containing the line \[\mathbf{r}=\mathbf{i}+\mathbf{j}+\lambda (2\mathbf{i}+\mathbf{j}+4\mathbf{k})\] is

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

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

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

The equation of the plane containing the line \[\mathbf{r}=\mathbf{i}+

1.	The equation of the plane containing the line \[\mathbf{r}=\mathbf{i}+\mathbf{j}+\lambda (2\mathbf{i}+\mathbf{j}+4\mathbf{k})\] is
A.	\[\mathbf{r}.(\mathbf{i}+2\mathbf{j}-\mathbf{k})=3\]
B.	\[\mathbf{r}.(\mathbf{i}+2\mathbf{j}-\mathbf{k})=6\]
C.	\[\mathbf{r}.(-\mathbf{i}-2\mathbf{j}+\mathbf{k})=3\]
D.	None of these
Answer» B. \[\mathbf{r}.(\mathbf{i}+2\mathbf{j}-\mathbf{k})=6\]

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The equation of the plane containing the line \[\mathbf{r}=\mathbf{i}+\mathbf{j}+\lambda (2\mathbf{i}+\mathbf{j}+4\mathbf{k})\] is

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