Though it is confirmed now that the merit list is going to be revised. I dont think it will change the merit orders of all candidates. Few will be affected. I also heard from a friend(whose brother's close frnd is Assisstant Director in FPSc) that FPSC is also preparing how will it defend itself in courts as new merit order will take many students to courts.
If there really is a big tremor in the new result, it may cost Rana Bhagwan Das his job.

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Whatever mind can conceive,it can achieve - W.Clement Stone