Basic General Knowledge
Free market is

market where the price of a commodity is determined by free play of the forces of supply and demand
a condition in the international market where nations do not impose customs duty or other taxes on import of goods
None of these
ports that are exempted from payment of customs duty on articles of commerce, primarily to encourage tourism

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Basic General Knowledge
DRDL stands for

Defence Research and Development Laboratary
Department of Research and Development Laboratory
None of the listed here
Differential Research and Documentation Laboratary

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