Mass–radius solutions for the neutron star in 4U 1746-37 as a function of blocking factor ℬ. The blue and red curves represent two analytical solution branches (R₁, M₁) and (R₂, M₂) obtained from solving the modified PRE equations for blocking factors ranging from ℬ = 0.1 to ℬ = 0.855. The black diagonal line shows the general relativistic causality limit $\beta \equiv \frac{\mathit{GM}}{R{c}^2}=1/2.94$. The (R₁, M₁) branch violates this constraint at small ℬ values, while (R₂, M₂) remains physically viable across a broader parameter range. Overlaid are nine equations of state (EoS) models: six normal nuclear matter models (KIDS, SGI, PAL6, APR3, ENG, H3) and three quark matter models (SQM1, SQM2, SQM3). Significant blocking ℬ ≳ 0.8 can reconcile neutron star parameters with canonical values predicted by normal nuclear matter equations of state.