(b)in the case of a public company, the income by way of interest in relation to such categories of bad or doubtful debts as may be prescribed having regard to the guidelines issued by the National Housing Bank in relation to such debts, shall be chargeable to tax in the previous year in which it is credited by the public financial institution or the scheduled bank or the State financial corporation or the State industrial investment corporation or the public company to its profit and loss account for that year or, as the case may be, in which it is actually received by that institution or bank or corporation or company, whichever is earlier.
