<prompt> Post is not required in all of the following conditions except:If adequate retention of core can be achieved by natural undercuts of crownIf there are horizontal cracks in the coronal portion of the teethWhen tooth is subjected to excursive occlusal stresses, that is, when there is presence of lateral stresses of bruxism or heavy incisal guidanceNone  <response>: Conditions where post should not be given:Any sign of endodontic failures are evident, i.e. tooth exhibits:Poor apical seal and poor quality obturationActive inflammationPresence of fistula or sinusTender on percussionIf adequate retention of core can be achieved by natural undercuts of crown.If there are horizontal cracks in the coronal portion of the teeth.When tooth is subjected to excursive occlusal stresses, that is, when there is presence of lateral stresses of bruxism or heavy incisal guidance. 