Now I am making 2d game in my home. I am so confused with the resolution.

Please anyone help me to choose the resolution

Let the user decide? Why force a resolution that the user doesn't want?

Default to the desktop resolution, and let the user (optionally) choose a lower res; be that windowed or full screen.

If the game you are making will not scale because the graphics you are using will be statically sized, then pick a resolution that you know the majority of screens will support for the target platform with consideration of what will be the most comfortable for you.

However you should aspire to make your game scalable on your target platform where the user can choose the resolution and your graphics display accordingly. This solution would target the most potential end users.