Some Gains and Losses Arising on a Revaluation of Property

Some gains and losses arising on a revaluation of property plant and equipment are to be included in other comprehensive income and that includes.When the asset is measured in a foreign currency,how would exchange differences be treated?

A) As an item to be included in income or loss for the year.
B) As a reduction or increase in the carry cost of the asset.
C) As a contra account to be fully disclosed and to show the impact of foreign exchange differences.
D) The differences should be included in the calculation of other comprehensive income.