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: Medicine
Reversed splitting of S2 heart sound is heard in 
Select and explain. 
A. Ventricular septal defect, B. RBBB, C. Acute pulmonary embolism, D. LBBB
D: LBBB
Answer: D: LBBB 
Explanation: Reversed splitting of heart sound S2 is seen in:

Aortic stenosis
PDA
Complete LBBB
WPW syndrome
Chronic ischemic heart disease
Post stenotic dilation of aorta secondary to aortic stenosis