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 space
Left 4th intercostal space
Left 5th intercostal space
Right 2nd intercostal space