Which of the following is not an example of flow variable?

Number of births during a year

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National wealth

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National income

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Wheat produced during a year

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Solution

The correct option is D National wealth
National wealth is not an example of flow variable. It is a stock since it is measured at a point of time. National wealth is not time dimensional. It is not measured over a specified period of time like flow. Therefore, national wealth is a stock concept.

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