I have taken notes all the Resto's you all mentioned here, i am going to try, from one resto, to other...then i will let you know the best in my taste. i also tasted the Dum biryani , in Dubai, it is where i started to love Biryani...
thank you all guys, who contibuted to suggest...

"There's nothing we can do to change the past, if it teaches  you a lesson profit from it then, forget it."