## 4 Results and Discussion
The existence of dual solutions for \(S>2\) in the present study is in accordance to the result by [PERSON] and [PERSON] [2], [PERSON] et al. [4], [PERSON] et al. [5] and [PERSON] et al. [6]. It is apparent from these previous studies that the flow will produce two solutions by employing \(S>2\) for a suitable combination of the control parameters. It also can be seen from Figure 2 that the skin friction coefficient inclines as \(\varepsilon\rightarrow-\varepsilon\) while declines when the stretching sheet (\(\varepsilon\rightarrow+\varepsilon\)) is considered. The sheet is at static motion when \(\varepsilon=0\) for all values of \(S\). Different characteristics of \(f^{\prime\prime}(0)\) are noticed for the second solution which can justify the reliability of first solution as the physical solution. The utilization of suction for both shrinking and stretching flow also boosts the heat and mass transfer rates as illustrated in Figures 3 and 4. Suction may assist the movement of heated fluid particles towards the wall and subsequently, increases both heat and mass transfer rates. The nanofluid velocity profile, as depicted in Figure 5, elevates while the temperature and concentration (see Figures 6 and 7) deteriorate with an upsurge of the suction parameter. This is due to the suction which can diminish the momentum boundary layer thickness and therefore enhance the flow near to the sheet [5]. Besides, suction also allows the heated fluid movement towards the wall surface and develops both thermal and concentration boundary layer thicknesses. Figure 3: \(-\theta^{\prime}(0)\) versus \(\varepsilon\) for various values of suction \(S\). Figure 2: \(f^{\prime\prime}(0)\) versus \(\varepsilon\) for various values of suction \(S\). Figure 5: Effect of suction \(S\) on the velocity profile. Figure 8 demonstrated the temperature profile with various \(\gamma_{T}\). The thermal relaxation parameter \(\gamma_{T}\) appears as a result of non-Fourier energy equation and it should be mentioned again that \(\gamma_{T}=0\) corresponds to the classical Fourier energy equation. The nanofluid temperature declines with an increment of \(\gamma_{T}\). Theoretically, when \(\gamma_{T}\) increases, the fluid particles take more time to transfer the energy to the neighbouring particles and hence, will lead to a reduction in temperature. The impact of thermal and solutal stratification parameters on temperature and concentration profiles are displayed in Figures 9-11. The nanofluid temperature enhances with the addition of thermal stratification  
Figure 6: Effect of suction \(S\) on the temperature profile. Figure 7: Effect of suction \(S\) on the concentration profile. parameter. The opposite result is observed with the increment of solutal stratification in which the temperature decreases while the concentration increases. The impact of magnetic parameter \(M\) on the dimensionless velocity, temperature and concentration profiles is portrayed in Figures 12-14. Surprisingly, the combined effects of suction \(S\), thermal buoyancy \(\lambda\) and shrinking (\(\varepsilon=-1\)) parameters gave the reverse effect of the magnetic parameter \(M\) on all the profiles. Theoretically, a magnetic field may induce a drag reduction known as Lorentz force which gives resistance to the fluid flow and hence decelerates the velocity as reported by [PERSON] et al. [69]. However, the shrinking flow with a high value of suction parameter (\(S>2\)) may contribute to the increment of velocity profile as plotted in Figure 12 and depreciate both thermal and concentration boundary layer thickness (see Figures 13 and 14). Figure 8: Effect of thermal relaxation \(\gamma_{T}\) on the temperature profile. Figure 9: Effect of thermal stratification \(\delta_{1}\) on the temperature profile. Figure 11: Effect of solutal stratification \(\delta_{2}\) on the concentration profile. Figure 10: Effect of solutal stratification \(\delta_{2}\) on the temperature profile. Figure 3:0 Effect of magnetic parameter \(M\) on the velocity profile.