image is shown in Figure \[fig10\]a.

As previously mentioned that the coverage of [*Spitzer*]{} 8.0 $\mu$m image (plate scale $\sim$0$''$.6/pixel) is available for an area of $\sim$5$'$.5 $\times$ $\sim$5$'$.5 hosting AFGL 5157. Hence, in order to select additional YSOs in this selected area, we have employed the [*Spitzer*]{} color-color plot (\[3.6\]-\[4.5\] vs. \[5.8\]-\[8.0\]), which is presented in Figure \[fig10\]b. This color-color space is useful for identifying the deeply embedded protostars [e.g., @gutermuth09]. We extracted photometry of sources at 5.8 and 8.0 $\mu$m, and the counterparts of these sources were obtained from the Glimpse360 photometric catalogs at 3.6 and 4.5 $\mu$m. Aperture photometry was performed on the [*Spitzer*]{} images (at 5.8 and 8.0 $\mu$m) with a 2$''$.4 aperture and a sky annulus from 2$''$.4 to 7$''$.3 using IRAF. The zero points for these apertures (including aperture corrections) are 17.4899 and 16.6997 mag for the 5.8 and 8.0 $\mu$m bands, respectively [see also @dewangan12 for further information on the [*Spitzer*]{} photometry]. Following the various conditions given in @gutermuth09 [see also @dewangan12], additional YSOs are identified. We have classified these selected YSOs into different evolutionary stages based on their slopes of the spectral energy distribution ($\alpha_{3.6-8.0}$) computed from 3.6 to 8.0 $\mu$m (i.e., 