  In this paper, we performed a spectro-polarimetric analysis of the transient
NS-LMXB XTE J1701-462 using IXPE, NICER, and NuSTAR data during its 2022
outburst. We report the significant detection of energy-dependent polarization
in the X-ray signal from the source on 2022 September 29 in the $2-4$ keV,
$4-8$ keV and $2-8$ keV energy bands with a polarization degree of $3.9 \pm
0.3$% (10.7$\sigma$), $5.5 \pm 0.6$% (9.1$\sigma$) and $4.5 \pm 0.4$%
(12.6$\sigma$), respectively. The polarization angle in the overall $2-8$ keV
band was found to be $\sim 143^{\circ}\pm 2^{\circ}$. The spectra were modelled
using a combination of thermal emission from an accretion disc, Comptonized
emission from a hot electron plasma (or corona) and a Gaussian line. From
spectro-polarimetric analysis, the polarization degree due to the disc emission
was found to have an upper limit of $\sim 11.5$%, and that of the Comptonized
emission was constrained at $7.7 \pm 2.5$% (at the 3$\sigma$ level). The
results suggest that the Comptonized component probably originates from a
spreading-layer/boundary-layer above the neutron star surface. IXPE observation
of the same source on 2022 October 8 does not show significant polarization
which can be attributed to a weakening of the coronal Comptonized emission. The
implication of these results are discussed.
