The Assessing Officer sought to rectify the original assessment order on the ground that carried forward business loss was to the tune of Rs. 24,23,760/- and same had been set off against the total income which was inclusive of the income earned by the assessee under the head “Income from Other Sources” and “Income from House Property” as declared by him in the return of income and carried forward loss could have been set off against “Business Income” only. As already observed by us herein above the issue as to whether the said income earned by way of interest on Fixed Deposits, NSCs, would be available to the assessee to seek for set off as business loss or not under section 72 of the Act is a debatable issue and as such we are of the considered view that said issue could not have been gone into in a proceeding under section 154 of the Act