I have passed 11th with science in RBSE board but now in 12th class i will change board from RBSE to HARYANA board then it is possible ?
Yes, there is no issue in changing board for class 12th, but Haryana Board will be considered during your college admissions. The curriculum will be a little bit more challenging, but you will adapt within a few months by putting some extra efforts. You can definitely get 90% or above if you work hard. Make sure to get admitted into a coaching institute there to make your task easier. Best of Luck.