Thank u very much guys.

The backup stradgey that the company has is not worth.
i know that.
I came to know that they don't have any back up stradgey.
I have to start working on it.

i tried all the different methods.
Trying with all different control files separately and with different combination but i could mount the database
but not open.

So the only way i am going to try is to create a new database and use my full export.

thanks once again guys.
If u have any other suggestions please let me know