The correct answer is: A. Bond
A bond is a fixed income instrument issued by a government or corporation. It is a loan that the issuer promises to repay, with interest, over a specified period of time. Bonds are typically used to finance long-term projects, such as building a new factory or highway.
T-bills are short-term debt obligations issued by the U.S. Treasury. They are considered to be one of the safest investments available, and they are often used as a benchmark for other investments.
Stock is a share of ownership in a corporation. When you buy stock, you are buying a piece of the company. Stocks can be bought and sold on stock exchanges, and their prices can go up or down depending on the company’s performance.
A promissory note is a written promise to pay a certain amount of money on a certain date. Promissory notes are often used to borrow money from friends, family, or banks.
In the question, the certificate of indebtedness of corporation usually for a period not less than 10 years and guaranteed by a mortgage on certain assets of a corporation is a bond.