When the demand for a commodity is confined within a country's national boundaries, often due to government trade policy, the product is said to have a:

1. A national market exists when demand for a commodity is limited to the national boundaries of a country. 2. The trade policy of the government may restrict trading within the country. 3. Hindi books having a market in India but not outside is the example given. 4. Therefore the national market is correct. _Source: ICAI BoS CA Foundation Paper 4 Business Economics, Ch 4 Unit I "Meaning and Types of Markets", p.2_