Which is the correct sequence of blood flow through the heart starting at the right atrium?

• A. Right atrium → left atrium → left ventricle → right ventricle → lungs → body
• B. Right atrium → left atrium → right ventricle → lungs → left ventricle → body
• C. Right ventricle → right atrium → lungs → left atrium → left ventricle → body
• D. Right atrium → right ventricle → lungs → left atrium → left ventricle → body

Answer: (D)