This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
Tri Fascicular block is: 
Select and explain. 
A. Left Anterior hemi block (LAH) and left posterior hemi block (LPH), B. RBBB + LAH, C. RBBB + PAH, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: Ans. D. None of the Above1. Bifascicular block is the combination of RBBB and left bundle hemiblock Either left anterior fascicular block or left posterior fascicular block2. Trifascicular block include:a. Prolongation of the PR interval (first degree AV block)b. Right Bundle Branch Blockc. Either left anterior fascicular block (LAB) or left posterior fascicular block (LPB)