Under section 2(17) of the Income-tax Act, 2025 "block of assets" for the purpose of charging…

Section 2(17) of the Income-tax Act, 2025 (formerly s.2(11) of the 1961 Act) defines a 'block of assets' as a group of assets falling within a class of assets in respect of which the same percentage of depreciation is prescribed. The class may consist of tangible assets (buildings, machinery, plant or furniture) or of intangible assets (know-how, patents, copyrights, trademarks, licences, franchises or similar commercial rights, but not goodwill).

Under section 33(3)(a), depreciation is allowed at the prescribed percentage of the written down value of each block, not asset by asset. A block is a group of assets, not a value arrived at after depreciation, and it may include intangible assets, so the other options are wrong.