A Special Purpose Vehicle (SPV) is a subsidiary company with a distinct asset/liability structure and legal status that ensures its obligations remain secure, even if the parent company goes bankrupt. SPVs are typically used in securitization transactions, allowing companies to isolate or pool assets, or to allow investors to invest in a specific set of risks. The SPV's assets are typically held off-balance sheet, which can help to protect them from the parent company's creditors. This structure also allows the parent company to maintain a cleaner balance sheet, while also potentially reducing the amount of capital required to be held against the assets. SPVs are often used in complex financing transactions, such as mortgage-backed securities, collateralized debt obligations, and lease financing.

Choice B is incorrect. While it is true that an SPV can be used to create asset-backed securities, the definition provided in this choice refers specifically to a mortgage-backed security (MBS), which is just one type of asset-backed security. An SPV's structure and purpose are not limited to the creation of MBSs.

Choice C is incorrect. This choice describes a Collateralized Debt Obligation (CDO), which is a type of structured financial product that can indeed be created using an SPV. However, this definition does not encompass all the possible uses and structures of an SPV.

Choice D is incorrect. This option describes a financial institution such as a bank or credit union, not an SPV. An SPV does not provide deposit, lending or investment products directly to individuals or businesses; instead, it serves as a separate legal entity created for specific financial purposes by another company.