Concept:A debenture is loan capital that gives a fixed annual interest to its holders.
Explanation:A public company can borrow long-term funds by issuing debentures to the public.
Debenture holders are creditors of the company, not owners.
They receive a fixed rate of interest every year, regardless of whether the company earns a profit.
This interest is paid before any dividend is distributed to shareholders.
An ordinary share provides dividend only when profit is made, so its return is not fixed.
A subvention is financial assistance or a subsidy, not a capital source with fixed interest.
An overdraft is a short-term bank facility carrying variable interest, not fixed-interest capital.
Thus, the source of capital described in the question is a debenture.
Answer:C. a debenture