Hello Sir,
Please be advised as follows:
1. Firstly, with respect to your entitlement, since this is an ancestral property and IF you are the LEGAL heir, then he cannot sell the YOUR property without your consent if it is partitioned and you can raise a dispute by the virtue of same being partitioned.
2. For better clarity, it is important to review few documents which are as follows:
i) Do you have the Partition deed with you?
ii) He can only sell the property as per the partition agreement which exclusively belongs to him and his registered in his name only.
II) Was the residential property told by you above in his name solely? (Any registered document with respect to the same if available)
iii) In the revenue records with the sub registrar presently has the registry been done in the name of the new owner to which your brother has sold the residential property?
Try and Find out to whom has he sold, does the new owner has got the registry done in his name or not yet?
Even if he has sold it, you can dispute it.
Please revert in case of any query. If you want to get your documents reviewed in any case, Please let me know. Will help you with the same.
Thank you for your time and Consideration.