| Column 1 | Column 2 | ||
| (p) | First In First Out | (i) | Stacks |
| (q) | Lookup Operation | (ii) | Queues |
| (r) | Last In First Out | (iii) | Hash Tables |
| List I | List II | ||
|---|---|---|---|
| 1 | FIFO | a | Stack |
| 2 | Look up op. | b | Queue |
| 3 | Last-In first out | c | Hash table |
What comes next in the series?
\(2, 6, 12, 20, 30, \ ?\)