Explanation:
National income is measured by product (value added), income and expenditure methods. Balance of payments is used for recording international transactions, not for measuring national income.
Explanation:
Demonetisation is the act of stripping a currency unit of its status as legal tender. In India, high denomination notes were demonetised in 2016.
Explanation:
A positive externality confers benefits on third parties. Vaccination protects not only the individual but also reduces the spread of disease to others.
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