S. 50 : Capital gains-Depreciable assets-Capital asset in respect of which depreciation has been obtained, option of substituting fair market value on prescribed date is not available to such a person- Assessee has enjoyed depreciation allowance,therefore his cost of acquisition shall have to be determined as provided in section 50 [S. 32,41(2), 43(6) , 45, 48. 49, 55(2(i)]