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Forward-backward (FB) multiplicity and momentum correlations of produced particles between symmetrically located pseudorapidity (η) intervals have been studied using the pQCD inspired EPOS3 model with and without hydrodynamical evolution of particles in protonproton (pp) collisions at the center-of-mass energy, s = 13 TeV. The pseudorapidity-gap (η g ap ) dependence of FB correlation strength is compared with our previously published results at s = 0.9, 2.76 and 7 TeV. The study reveals that the general trends of FB correlation strength at s = 13 TeV are similar to our previous observations at lower center-of-mass energies. We also find that the δη-weightage average of FB correlation strength as a function of different center-of-mass energies ( s = 0.9, 2.76, 7 and 13 TeV) tends to saturate at very high energy.