Which of the following statement is not correct about loaded spiral spring?

• A.The extension is proportional to the load applied, provided the elastic limite is not exceeded
• B.If the elsatic limit is not exceeded, the contraction is proportional to the load removed.
• C.Up to the yield limit, extension is no longer proportional to the applied load.
• D.Beyond the elsatic limit, extension is no longer proportional to the applied load.
• E.If the string regains its shape or form after deformation, it is said to be elastic.