Question

can some body give me the correct answer for.when observer is near the electron screen the output is not correct but when the observer is not present we get the correct pattern

Answer 1

because our body have current static

Answer 2

It has nothing to do with the observers physical proximity to the screen, it is the act of observation itself that causes the collapse of the wave function, leading to a lack of any diffraction pattern. It's not that one pattern is more "correct" than the other, it's just that which pattern you get depends on whether or not the experiment is being observed. Nature behaves differently when you're not looking. Please ignore the answer given by "noras", it has no validity whatsoever.