(2)Where the gross total income of the [specified fund or] Foreign Institutional Investor—(a)consists only of income in respect of securities referred to in clause (a) of sub-section (1), no deduction shall be allowed to it under sections 28 to 44C or clause (i) or clause (iii) of section 57 or under Chapter VI-A;(b)includes any income referred to in clause (a) or clause (b) of sub-section (1), the gross total income shall be reduced by the amount of such income and the deduction under Chapter VI-A shall be allowed as if the gross total income as so reduced, were the gross total income of the [specified fund or] Foreign Institutional Investor.