The correct option is A annuity method
By leasehold it means the property is taken on lease for a certain number of years. The most general duration is 99 years, but may be less or much more. The lump sum is paid in advance at the time of taking the lease. This should be regarded by the lessee as the capitalized value of an annuity during the life time of the lease. Depreciation is based on such annuity and is generally a fixed amount every year.