Which of the following is a written acknowledgement of a loan to a company?

The written acknowledgement of a loan to a company is known as a debenture.

Let's explain further: A debenture is a type of long-term security issued by a company. It acts as a contract that specifies the details of the loan, including the amount borrowed, the interest rate, and the repayment schedule. Unlike some other forms of debt, debentures do not have any physical assets pledged as collateral. This means they are backed solely by the creditworthiness and reputation of the issuer.

In summary, a debenture serves as a formal and written promise from the company to pay back the borrowed money with interest at a future date. It is a common tool for companies to raise capital while providing investors an opportunity to earn interest on their investment.