  In this article, we have done a thorough investigation of the possible
effects of interaction between dark matter (DM) and neutrinos on reionization
history. We have constrained the interaction strength using 21 cm Cosmology and
found out possible deviations from standard, non-interacting $\Lambda$CDM
scenario. Comparing the results with the existing constraints from present
cosmological observations reveals that 21 cm observations are more competent to
constrain the interaction strength by a few orders of magnitude. We have also
searched for prospects of detecting any such interaction in the upcoming 21 cm
mission SKA1-Low by doing a forecast analysis and error estimation.
