Q3

Which of the following is a vector equation of the line joining $A(4,2,5)$ and $B(-2,2,1)$?

A. $\vec r=\begin{pmatrix}4\\2\\5\end{pmatrix}+\lambda\begin{pmatrix}1\\2\\3\end{pmatrix}$
B. $\vec r=\begin{pmatrix}4\\2\\5\end{pmatrix}+\lambda\begin{pmatrix}3\\0\\2\end{pmatrix}$
C. $\vec r=\begin{pmatrix}1\\2\\3\end{pmatrix}+\lambda\begin{pmatrix}4\\2\\5\end{pmatrix}$
D. $\vec r=\begin{pmatrix}3\\0\\2\end{pmatrix}+\lambda\begin{pmatrix}4\\2\\5\end{pmatrix}$