When there is pension and compensation, which ITR form I need to file?

I got Income from Pension, House property, Interest on FDR. This year besides my regular income I received compensation from Government for compulsory acquisition of land (NOn-Ag Land) Which is exempt u/s 10(37) vide Circular No 36 of 2016 dated 25th october 2016. Which ITR form i have to file? Where I have to show this exempt Income? In which column ? In 26 Compensation is shown as 20 Lakhs that is entire amount and TDS is made. whether I have to show entire amount or deduct my purchase cost? IF I index cost of acquisition is 5 Lakhs and my gain comes to 15 Lakhs (20-5)? Any difference of amount shown in 26AS to ITR may result a query from IT Department. PLease advice