Mathematics - Sequence & Series Question with Solution | TestHub

$a,b,c$ are in A.P. and the points $A(a,1),B(b,2)$ and $C(c,3)$ are such that $(OA{)}^2,(OB{)}^2$ and $(OC{)}^2$ are also in A.P. O being the origin, then which of the following options is/are correct