Commercial Plot dispute - Self acquired Plot - orally undivided family

Details of case : - I purchased a commercial plot in 1995 from sources of funds without taking a single rupee from my brothers. - When this plot was purchased, oral partition was not done in my family. I was living in other city due to job. - The plot is registered in my name. - Now I started construction on the said plot. My brothers are telling that because this plot was purchased by me when oral partition was not done, they have equal right over this. - Payment for the purchase of plot has been done in cash. - I am Hindu by religion. Questions : - Whether my brothers have right over this plot. Whether they are logical or illogical. - Is there any liability from my side to them in this plot. - How I prove that it is my personal self acquired property and they do not have rights in this (Please note that plot is registered in my name).