Income Tax- 50% Ded on Int.on Enhansed Land Comp.Treatmnt

My wife Recd INT Rs 35945 - on Enhanced Comp. of land Acquired in 1977-78 by Pb. Govt Org. which is Taxable u/s 56(2)viii
But against which a Dedn.of 50% is allowed u/s 57(iv) in Income Tax on above INT on Comp.
Friends can any Expert Guide me Reg. following.

1. u/which Col of ITR-3 Int. Rs 35945/- on Enhanced Comp is to be shown

2. U/which Col of ITR-3, - 50% Ded Rs 17972/- u/s 57(iv) is to be shown for availing Dedn. pl. advise.
thanks in advance