1. Kharab land whether "A" or "B" belongs to the occupant of the Survey Number.
2. However since there is uncertainty over the area which is to be considered as Kharab land you can apply for re-measurement or re-survey of land so the damage may be less.
3. if the Tehsildar refuses to re-survey the land then you can approach the high court in writ jurisdiction.
4. In the writ petition you can challenge the classification of land as ' Kharab' also.