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.