  Event-by-event particle ratio fluctuations for simulated data sets of three
different models named UrQMD, AMPT, and Pythia are studied using the
fluctuation variable $\nu_{dyn}$. The simulated data sets produced in $pp$
collisions at four different LHC energies $\sqrt{s} = 2.76, 5.02, 7$ and $13$
TeV are generated and considered for this analysis. The variation of
fluctuation parameter $\nu_{dyn}$ for accepted pair of meson and baryon
combination $i.e.$ $[\pi, K]$, $[\pi, p]$ and $[p, K]$ with the increasing
value of the mean multiplicity of charged particles ($\langle N_{ch} \rangle$)
are investigated. It has been observed that the correlation between the
particle pair $[\pi, K]$ is more than that of the two other particle pairs
$[\pi, p]$ and $[p, K]$. However, the energy-wise inspection of the fluctuation
variable $\nu_{dyn}$ for $0-10\%$ centrality data shows the increase in the
correlation between the particles in each pair for all three models considered.
