A progressive transverse sine wave is passing through a string held along x axis. Consider a small element of the string. Choose

Question

A progressive transverse sine wave is passing through a string held along x axis. Consider a small element of the string. Choose the correct statement(s): 
The element executes SHM in a direction perpendicular to x axis. 
When the element reaches the extreme position, its elastic potential energy is maximum and its kinetic energy is zero. 
When the element reaches the mean position, its kinetic energy is maximum but its elastic potential energy is zero. 
At any given instant of time, the kinetic energy and elastic potential energy of the element are the same.

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