Income tax and property sale

Deceased fathers property sale and distribution amongst son and mother Father died intestate, Sons are legal heirs of the property belonged to deceased father. Now if that property is sold and the proceeds are equally distributed amongst sons and monther. will the sale proceed so acquired post the sale be treated as income to the each of the son and monther even after paying capital gains tax? is there any exemption from income tax gained from the sale of the property.?