Which of the following is not a recognized RPA tool?

The recognized RPA tools are specifically designed to automate repetitive tasks across various applications without the need for extensive coding or programming knowledge. Blue Prism, UiPath, and Automation Anywhere are well-established platforms renowned for their capabilities in Robotic Process Automation, providing functionalities like process design, reporting, and analytics.

On the other hand, Blackline is primarily known as a financial software solution for automating financial processes and ensuring compliance, rather than being categorized as an RPA tool. It focuses on areas such as financial close, reconciliation, and accounting automation, but it does not offer the comprehensive RPA functionalities inherent to the other tools mentioned. Therefore, recognizing that Blackline does not fit within the standard classification of RPA tools helps to clarify why it is the correct response in this context.