<prompt> Alternating RBBB with Left anterior hemiblock is seen in1 degree hea blockComplete hea blockMobitz type II blockBi-fascicular block  <response>: Ans. is d i.e., Bi-fascicular block Bifascicular block - combination of RBBB with either left anterior hemiblock or left posterior hemiblock. Tri fascicular block - RBBB plus either LAHBLPHB first degree AV block. Complete hea block destruction of - AV node leading to AV dissociation 