Basic General Knowledge
Recently lead free petrol was introduced in our country because

they tower the efficiency of the engine
they cause less pollution
to reduce the cost of petrol
they are not needed now as anti-knock agents

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Basic General Knowledge
Free market is

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

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