Goods like National defence roads ete can not be provided through the market mechanism ie by transactions between individual consumers and producers and must be provided by the government. This is a matter of

LIST I		LIST II
A	Quotas	I	Monetary assistance given by government for production activities
B	Import substitution	II	Government protects domestic industries from foreign competition
C	Tariffs	III	Tax on imported goods
D	Subsidy	IV	Specify the quantity of goods which can be imported

Goods like National defence roads ete can not be provided through the market mechanism ie by transactions between individual consumers and producers and must be provided by the government. This is a matter of: