(d)"new asset" means new plant and machinery but does not include -(i)any machinery or plant which, before its installation by the assessee, was used either within or outside India by any other person;(ii)any machinery or plant installed in any office premises or any residential accommodation, including accommodation in the nature of a guest-house;(iii)any office appliances including computers or computer software;(iv)any vehicle; or(v)any machinery or plant, the whole of the actual cost of which is allowed as a deduction (whether by way of depreciation or otherwise) in computing the income chargeable under die head "Profits and gains of business or profession" of any previous year.'.