Tangents drawn from the point $P(1,8)$ to the circle $x^2+y^2-6x-4y-11=0$   touch the circle at the points A and B then which of following statements are true 

The  circum circle of $\Delta PAB$  does not passes through centre of given circle

The  circum circle of  $\Delta PAB$  must passes through centre of given circle 

Length of chord of contact of P w.r.t given circle is  $4\sqrt{\frac{12}{5}}$  

Centre of circum circle of  $\Delta PAB$ is $(2,5)$