Long term capital gain tax on property

Dear all,

My mother purchased a land in my name (when i was child) 30 years back.  I have 3 sisters also.   Now i am planning to sale  the land and share the amount in particular ratio with my sisters.   Since property is my name. 1 )have to bear all capital gain tax?   2 ) i have pay tax for my portion only ?   and also suggest me how to avoid  tax ?  3)   I have already had house which i bought through house loan, if i repay the loan from the sale of property, shall i claim capital gain exemption?   

Saran