<prompt>  A 48-year-old man with mitral regurgitation MR comes to the physician for a routine examination. The best position to auscultate for MR is usually at the apex. Which of the following options most accurately corresponds to the location to auscultate?Left 2nd intercostal spaceLeft 4th intercostal spaceLeft 5th intercostal spaceRight 2nd intercostal space 