If the points `A(3,4),B(x_1 ,y _1) and C(x_2 ,y_2)` are such that both `3 , x_1, x_2 and 4, y_1 ,y_2` are in AP, then
`(i)` A , B , C are vertices of an isosceles triangle
`(ii)` A , B , C are collinear points
`(iii)` A , B , C are vertices of a right angle triangle
`(iv)` A , B , C are vertices of a scalene triangle
`(v)` A , B , C are vertices of a equilateral triangle