(d)profit split method, which may be applicable mainly in international transactions or specified domestic transactions involving transfer of unique intangibles or in multiple international transactions or specified domestic transactions which are so interrelated that they cannot be evaluated separately for the purpose of determining the arm's length price of any one transaction, by which-(i)the combined net profit of the associated enterprises arising from the international transaction or the specified domestic transaction in which they are engaged, is determined;(ii)the relative contribution made by each of the associated enterprises to the earning of such combined net profit, is then evaluated on the basis of the functions performed, assets employed or to be employed and risks assumed by each enterprise and on the basis of reliable external market data which indicates how such contribution would be evaluated by unrelated enterprises performing comparable functions in similar circumstances;(iii)the combined net profit is then split amongst the enterprises in proportion to their relative contributions, as evaluated under sub-clause (ii);(iv)the profit thus apportioned to the assessee is taken into account to arrive at an arm's length price in relation to the international transaction or the specified domestic transaction :