The correct answer is A) Your monthly study loan payments.
The complete question is the following. What of the following is not a source of income?
The options of the question were A) Your monthly study loan payments. B) the stipends you receive for doing an internship. C) your annual salary for doing your job. D) the wages you receive after a work shift.
A source of income is that thing or activity that generates some kind of money for you after a job is done or after a consultancy. If you want to get a permanent source of income to pay your bills and debts, you better get a decent job that generates the amount of money you need to make a living.