The ortho centre of triangle formed by the points (2,1,5),(3,2,3), (4,0,4) is

$AB=BC=CA=\sqrt{6}\Rightarrow {\mathrm{\Delta }}^{le}ABC$ is equilateral triangle

Since the triangle is equailateral triangle, all centers of equilateral triangle is coincident

Hence, the centroid of the triangle is $G\left(\frac{x_1+x_2+x_3}{3},\frac{y_1+y_2+y_3}{3},\frac{z_1+z_2+z_3}{3}\right)$

Hence the centroid is $G\left(\frac{2+3+4}{3},\frac{1+2}{3},\frac{5+3+4}{3}\right)=G\left(3,1,4\right)$

$G=O=S=I=(3,1,4)$