The correct option is B Annuity method
Option A is correct. The Annuity method of depreciation is a process used to calculate depreciation on an asset by calculating its rate of return as if it was an investment. The annuity method assumes that the sum spent on buying an asset is an investment that should be expected to yield interest. As such, the interest is charged on the diminishing balance of the asset, It is then debited to asset account.