Explanation:

Under the Negotiable Instruments Act, 1881, promissory notes, bills of exchange, and cheques are explicitly defined as negotiable instruments. A Fixed Deposit Receipt (FDR), while representing a sum of money, is generally not considered a negotiable instrument because it is not unconditionally transferable by mere endorsement and delivery in the same manner as the other instruments. Its transfer typically requires the involvement and consent of the issuing bank.