MCQ
Let $\vec a = 2\hat i + {\lambda _1}\hat j + 3\hat k$, $\vec b = 4\hat i + \left( {3 - {\lambda _2}} \right)\hat j + 6\hat k$ $\vec c = 3\hat i + 6\hat j + \left( {{\lambda _3} - 1} \right)\hat k$ be three vectors such that $\vec b = 2\vec a$ and $\vec a$ is perpendicular to $\vec c$. Then a possible value of $\left( {{\lambda _1},{\lambda _2},{\lambda _3}} \right)$ is
- A$(1, 3, 1)$
- ✓$\left( {-\frac{1}{2},4, 0} \right)$
- C$\left( {\frac{1}{2},4, - 2} \right)$
- D$(1, 5, 1)$