And (0, 3) are two opposite vertices of a square. The other two vertices are
a)		b)		c)		d)

(c)

Let the points be  and  and coordinates of mid point of  are

And coordinates of mid point of  are (0, 1)

We know that mid point of both the diagonals lie on the same point .

  and 

     …(i)

and   (ii)

also, slope of

    …(iii)

On solving Eqs. (ii) and (iii), we get

Now, slope of

 The required points are (2, 1) and