Hi aspirant, the thing is that even if you have studied science subjects in your class 11th, but do not wish to do so anymore After your class 11th, you can switch to any field you wish- Commerce or Humanities. But once you get registered for 12th with any stream than it is not possible to change the stream again in any case.

In case of emergency there are other sets of instruction and steps that one needs to follow that time.

Thank You.