understand the crux...do not laugh it away by saying related / unrelated...I also know Tamil Nadu & GT are partial ac and non ac...I want to say that such arbitrariness (or this may be railway policy) is there in the priority list of providing LHB that a rajdhani is not provided LHB while other trains are being given LHB...southern aur northern to argument ke liye hain...there should be a policy na...you provide lhb first to all shatabdis/rajdhanis/durontos...then shift your focus to other trains...