Statistically corrected D/H and D₂/D ratios percentages for c-C₃H₂, in purple and orange, respectively, for the sources in the Perseus molecular cloud (this study, circles), and additional sources in the Chamaeleon molecular cloud, Cha-C2 (Lis et al. (2025), cross), and the Taurus molecular cloud, shaded in grey: CB23, L1400A, L1495, L1495AN, L1495AS, L1495B, L1512, L1517B, TMC2 (Chantzos et al. (2018), triangles), TMC-1C (Spezzano et al. (2013), square), and L1544 (Giers et al. (2022), diamond). The horizontal dashed purple and orange lines and bands indicate the median with standard deviation for the D/H and D₂/D for the Perseus and the Taurus cores separately. For the Chamaeleon molecular cloud, just one source, Cha-C2, is reported, so no median is given. Instead the value of the corrected D/H ratio is plotted.