<prompt> Tri Fascicular block is:Left Anterior hemi block LAH and left posterior hemi block LPHRBBB LAHRBBB PAHNone of the above  <response>: 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 blockb. Right Bundle Branch Blockc. Either left anterior fascicular block LAB or left posterior fascicular block LPB 