Mass versus radius, Virial versus mass, and Cumulative distribution function (CDF) of mass relation for three type clumps. (a) Mass and radius relationships for all identified ¹³CO leaves. The red, green, and blue dots correspond to HDL, bubble, and quiescent clumps, respectively (see Fig. 8). The dotted lines shows the best power-law fit to each of the data. The yellow area denotes the empirically derived parameter set m(r) < 870 M_⊙(r/pc)^1.33, where massive star formation should not occur (Kauffmann & Pillai 2010). (b) Virial and mass relationships for all ¹³CO clumps, The black dashed lines correspond to positions with virial values of 1 and 2. Values below unity represent the gravitationally bound state and values above two are gravitational unbound,respectively. (c) CDF ofmass between HDL(red line),bubble (green line),and quiescent regions (blue line). The grey dots with errorbars in (a) and (b) show the median mass, radius, and virial parameter uncertainties in different bins along each axis.