Answer: (C) Portfolio income
Step-by-step explanation:
The portfolio income is one of the type of extra income which can be earn by investing in the bonds and stocks. The portfolio income is the type of income that are come from the interest in the stock market, investment and from the capital gains.
The portfolio income is not earn from the business activities and the passive investment. It is typically comes from the interest income and by investment. Therefore, Option (C) is correct.