triangle PQR is a right triangle in the Cartesain plane with right angle at R.P = (-2,1), Q = (4,3) and R lies vertically above P. the midpoint of PQ is M.

WHITCH ONE OF THE FOLLOWING IS/ARE TRUE?

A. R=(-2,3)

B. M=(1,2)

C. D (R,M) = (( sqeare root of 5 ) units)