Which of the following can not be classified as a "Stock" variable?

None of the above

The correct answer is Option 4: None of the above

Stock variables are those variables which are measured at a particular POINT of time whereas, flow variables are those variables which are measured over a PERIOD of time.

• Wealth of the country: A measure of the total accumulated wealth at a specific point in time.
• Loan taken by India from Japan: The total loan outstanding at a particular moment.
• Opening stock of a firm: The inventory or stock held by a firm at the beginning of a period.