We have calculated the g(r) from the last 10ns of the total trajectory. The position of this particular peak is also verified earlier by other groups. While increasing the wt% of reline in the system (W-UC (2:1) to W-UC (8:4)), water-oxygen atoms (Ow) approach each other as evident from Banerjee et al. , where the authors show that owing to hydrogen bond formation between water-oxygen and the hydrogen bond donor, there is a peak around 0.2 nm. Here too, we have considered the center of mass (COM) rdf for urea and choline around Ow, where both molecules have potential hydrogen bond donor sites and Ow is an acceptor. For a deeper analysis of the distribution, we have plotted the g(r) of Ow/Urea/Choline around Ow for each system individually (Fig S2 in Supplementary Information) where peak intensity and peak positions of the constituents for a particular system are clearly visible.