Satyanarayana Rao J. held that the words " previous year " in sub . section (1) of section 25 refer to the year of account relevant to the year of assessment in which the discontinuance occurs, that the section authorises the Income tax Officer to make a cumulative assessment in respect of the profits of the period between the end of the last accounting year of which the profits have been assessed before the date of discontinuance and that date, that " sub section (3) of section 25 is an exception to the general rule contained in sub section (1) of that section, and that, though the language employed in sub section (3) does not correspond to the language employed in sub section (1) indicating that in this Sub section also the assessment year should be taken to be the year in which the discontinuance occurs, all the same there is no reason 497 to depart and to place a different interpretation on the expression 'previous year ' in this sub section$ from the one placed on sub section (1).