Explanation:

- Fiscal policy involves government actions that influence the economy by adjusting spending levels and tax rates.

- Public Expenditure: Refers to government spending on goods and services, infrastructure, and welfare programs to stimulate economic growth.

- Tax: Involves setting tax rates to control inflation, regulate consumption, and affect economic activity.

- Public Debt: Concerns managing the government’s borrowing to fund expenditures and control the money supply.

Option:4 - All of these is correct because all mentioned elements are integral parts of fiscal policy.