Explanation:

- Revenue Budget: This component accounts for the government's revenue and expenses. It covers all the income from taxes and non-tax sources and expenses incurred to run the nation.

- Investment Budget: While important, there's no specific budget solely for investments in the government framework. Investments may happen under broader budget types.

- Income Budget: This term isn't typically used in government budgeting. Income here would usually fall under the revenue category.

- Expenditure Budget: This component details the government's spending. It includes all the expenses made by the government for various public services.

Revenue Budget and Expenditure Budget are the main components of a government budget.