| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | German submarine U-21 (1936) - Summary of raiding history |  |  |  |  |
| 3 | Date | Name | Nationality | Tonnage | Fate |
| 4 | 21 November 1939 | HMS Belfast | Royal Navy | 11,500 | Damaged (mine) |
| 5 | 1 December 1939 | Mercator | Finland | 4,620 | Sunk |
| 6 | 21 December 1939 | Carl Henckel | Sweden | 1,352 | Sunk |
| 7 | 21 December 1939 | HMS Bayonet | Royal Navy | 605 | Sunk (mine) |
| 8 | 21 December 1939 | Mars | Sweden | 1,475 | Sunk |
| 9 | 31 January 1940 | Vidar | Denmark | 1,353 | Sunk |
| 10 | 24 February 1940 | Royal Archer | United Kingdom | 2,266 | Sunk (mine) |

Question: Which Swedish ships did U-21 sink?
Answer: German submarine U-21 sank Mars and Carl Henckel both from Sweden on 21 December 1939.