This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
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? 
Select and explain. 
A. Left 2nd intercostal space, B. Left 4th intercostal space, C. Left 5th intercostal space, D. Right 2nd intercostal space
C: Left 5th intercostal space
Answer: C: Left 5th intercostal space 
Explanation: None