| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | London Underground C69 and C77 Stock - Numbering |  |  |  |  |
| 3 | Formation | Formation | Reversible units | Reversible units | Notes |
| 4 | Formation | Formation | 5xxx (DM) | 6xxx (UT) | Notes |
| 5 | Numbers | C69 | 5501 : 5606 | 6501 : 6606(1) | 5585(1) destroyed in 1975. 5505 partly destroyed in 2005 - rebuilt as 5606(2) 6505 renumbered 6606(2) in 2008 |
| 6 | Numbers | C77 | 5701 : 5733 | 6701 : 6733 | 6713 partly destroyed in 2005 - rebuilt as 6734 5713 renumbered 5734 in 2008. |
| 7 | Numbers | C08 | - | 6606(2) 6734 | - |

Question: What were the remains of the London Underground C69 and C77 Stock used for in which new cars?
Answer: The remains were used in the building of new cars 6606 (the second car with this number) and 6734.