The technique of Taylor that contradicts the principle of "Unity of Command" in General Management is:

(3) Functional Foremanship.

In Taylor's scientific management system, functional foremanship involved the appointment of multiple specialists to supervise and guide workers in various aspects of their work. For instance, there could be one foreman for production planning, another for quality control, and so forth. This concept was contrary to the principle of unity of command, which emphasizes that an employee should receive orders from only one superior.