Banks have started many new delivery channels to make banking convenient for the customers. Which of the following is not a delivery channel adopted/developed by the banks?

The question asks which option is NOT a banking delivery channel. ATMs, tele banking, internet banking, and any branch banking are all established delivery channels that banks use to make services convenient for customers. 'Operational Banking' is not a delivery channel - it refers to the internal operations and processes of running a bank, not a method for delivering services to customers. Therefore, option E is the correct answer.