LIST I | LIST II Water Supply | ||
A | Indian Iron and Steel Company (IISCO) | I | Kharkai |
B | Tata Iron and Steel Company (TISCO) | II | Bhadravati |
C | Visvesvaraiya Iron and Steel Company (VISL) | III | Koel |
D | Rourkela | IV | BarakarSteel |
What comes next in the series?
\(2, 6, 12, 20, 30, \ ?\)