“…From thermodynamics point of view in cosmological scenario, the enveloping surface should be apparent horizon and not the event horizon [74]. Apparent horizon as universe's boundary have been used in literature for examining the validity of GSLT in different cosmological set-ups [19,23,25,52,55,57,61,73,74]. In flat-FRW universe, radius of apparent horizon is related with Hubble parameter as R a = 1 H .…”