Gift deed

sir, my name is m.venkatarao. in 1956 my big mother is register to me gift deed with life intrest. 10.00 acres but she sold 4 acre land in 1988. i dont know she is selling. then 1 buyer also selled 2004 on the 4 acre land.and 2 buyyer has sold 2008 that 4 acre land.and 3rd buyyer sold 2013 to new buyer 2012 my big mother died. tell me i have rights on the 4 acres land?? plz telme sir. 1. 1956 i have gift deed on 10 acres. 2. 1988 she sold 4 acres to a. 3. 2004 a sold 4 acres to b. 4. 2008 b sold 4 acres to c. 5. 2013 c sold 4 acres to d. * my big mother died 2012 i dont know that property is mine can i have right of the 4 acres of land. 6 acres i position on the land. please tell me sir