Find the position vector of the mid point of the vector joining the points $P(2, 3, 4)$ and $Q(4, 1, –2)$.

Question

$\begin{array}{1 1}(A) 3\hat i + 2\hat j - \hat k. \\ (B) 3\hat i + 2\hat j + \hat k. \\(C) 6\hat i + 4\hat j -2 \hat k. \\(D) 6\hat i + 4\hat j +2 \hat k. \end{array}$