According to internal sources of JPSC ,the commission has ratified the model answer but they donot want to take chances any more so they will publish the answer key on the commission's site and will seek the objection prior to release the fresh result.
The students will be requested to register their openion over the Model answer key if they finds any error in that.
As far as number of result is considered JPSC is yet to decide on that.
JPSC 4th civil services Examination is under controversy right from the notification till Answer key release ,Here is the chronology
Notification: Age related Controversy was witnessed during the notification of the examination
Examination Date Controversy: The JPSC web site was jammed and aspirants were unable to download the Admit card so date was extended at the last minutes
Examination Controversy: Large number of Question Repeated from UPSC Civil services Examination were seen, and even the Examination controller of the JPSC has recommended the cancelation of PT.
Result Controversy: Scaling and improper representation of all the optional, Category wise cut off and many students got more than maximum marks after the release of Result sparked the controversy.
Answer Key Controversy: Wrong answer in most of the papers including General studies has also added new flavor in the ongoing controversy.