Pick out the item which is not a part of non-plan expenditure on the revenue side.
Central assistance to states is not a part of non-plan expenditure on the revenue side. Non-plan revenue expenditure is accounted for by interest payments, subsidies (mainly on food and fertilisers), wage and salary payments to government employees, grants to States and Union Territories governments, pensions, police, economic services in various sectors, other general services such as tax collection, social services, and grants to foreign governments.