Capital gain

You can save in two ways
i) invest in RECL bonds or NHAI bonds upto 50 L rupees subject to condition that you shall not redeem upto 5 years.
FOR BETTER KNOWLEDGE REFER 54EC OF INCOME TAX ACT.

ii) buy a residential house property provided that net consideration is to invest in House property.

FOR BETTER KNOWLEDGE REFER 54F OF INCOME TAX ACT.

To avoid Tax on LTCG You have options -

a. invest LTCG (after indexation) amount in Capital Gains Bonds of REC NHAI under 54EC within six months from sale of land

OR

b) Invest the net consideration money into new Residential house under section 54F (Subject to section conditions)

If the land is situated outside the jurisdiction of municipality and the land is used for agriculture purpose then the total LTCG is exempt.

otherwise you can do the two ways discussed in above to get the benefit of LTCG.