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 G2 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 (X1 = 0) is given by
• D. Manipulated variable is represented by C.