Concept:Disposable income is the amount of income left after statutory deductions such as taxes are removed from personal income.
Explanation:Personal income is the total income earned by an individual before any deductions.
From this personal income, taxes such as income tax are subtracted.
The income that remains after this deduction is called disposable income.
This remaining amount can be freely spent or saved by the individual.
Option A describes domestic income, while Option B describes national income.
Option D incorrectly suggests adding income tax to gross income.
Only Option C correctly states the idea of deducting personal income tax from personal income.
Answer:C. when personal income tax is deducted from personal income