Hello swati

In gujrat board, student have to firslt pass  the board exam and then only you can get trial certificate.

Trial certificate is that, in how many trials you have passed these board exam, if you pass the exam, you will get that. Otherwise it is not possible.

In reassessment there is no need of trial certificate. I don't know who is asking that from you. Because trial certificate gets only after you pass, so it will not get you.