[en] In the present investigation, different effective QCD models, like Nambu-Jona-Lasinio (NJL) model, Polyakov loop extended NJL (PNJL) model and entangled PNJL (EP- NJL) model have been studied. These effective QCD models build a quasi-particle description of thermo-dynamics for interacting medium, where mass-less quark with Fermi-Dirac distribution is transformed to temperature dependent mass in NJL model and additional modified distribution functions in PNJL and EPNJL models. A detail discussion on these models have been addressed. Using their constituent quark masses MQ(T), estimated herewith is respective η’s, which are presented here