Multiple choice

If in a $\triangle ABC, A = (2, 20), circumcentre = (-1, 2)$ and orthocenter $= (1, 4)$, then the coordinates of mid point of side opposite to vertex $A$ is

$\left (\dfrac{-8}{3}, \dfrac {44}{3}\right )$
$(1, 2)$
$\left (-\dfrac {3}{2}, 6\right )$
$\left (\dfrac {1}{3}, \dfrac {8}{3}\right )$

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