Block diagram of a simple standard control system is shown below in the figure. Which of the following statement about the above control system is wrong ?

• A. The transfer functions of the measuring element and the process is represent by H and G 2 respectively
• B. The overall transfer function for the change in load ( X = 0) is given by
• C. The overall transfer function for the change in set point ( X 1 = 0) is given by
• D. Manipulated variable is represented by C.