The correct answer is (a).
A free trade zone is an area where goods can be imported and exported without paying customs duties or other taxes. This allows businesses to operate more efficiently and cost-effectively. Free trade zones are often located near ports or airports, making it easy for businesses to ship goods in and out.
Option (b) is incorrect because it is not a defining characteristic of a free trade zone. While some free trade zones may allow any entrepreneur to start an industry, this is not always the case. In some cases, there may be restrictions on the types of businesses that can operate in a free trade zone.
Option (c) is incorrect because it is not a defining characteristic of a free trade zone. While some free trade zones may provide infrastructural facilities to entrepreneurs, this is not always the case. In some cases, businesses may have to pay for these facilities themselves.
Option (d) is incorrect because it is not a defining characteristic of a free trade zone. While some free trade zones may exempt industries from excise duties, this is not always the case. In some cases, businesses may have to pay these duties.
In conclusion, the correct answer is (a). A free trade zone is one where trade is done without restriction.