Correct option is D
The aortic valve area is best auscultated at the second intercostal space at the right sternal border. This anatomical location allows for optimal transmission of sound from the aortic valve. Accurate placement of the stethoscope is crucial in detecting murmurs and valve abnormalities. Other cardiac auscultation landmarks include the pulmonic, tricuspid, and mitral areas.
Explanation of options: (a) ✘ Fourth intercostal space, left sternal border – This is the tricuspid valve area. (b) ✘ Second intercostal space, left sternal border – This is the pulmonic valve area. (c) ✘ Fifth intercostal space, midclavicular line – This is the mitral valve area (apex of the heart). (d) ✔ Second intercostal space, right sternal border – This is the correct site to auscultate the aortic valve.