Hi aspirant,

According to the latest update from central board of secondary education, any candidate unsatisfied with the marks alloted to them by school can challenge the decision or appear for the improvement examination in the subjects he wishes for. If you don't appear for the improvement test and you have passed out the senior secondary examination, you can't appear for the boards next year as usual. You though have an option to file a new registration and appear for the examination in subsequent year.

Hope it helps!!