| [ A ]    9 : 10 |  | 
| [ B ] 20 : 13 | |
| [ C ] 13 : 10 | |
| [ D ] 10 : 9 | 
| [ A ]    9 : 10 |  | 
| [ B ] 20 : 13 | |
| [ C ] 13 : 10 | |
| [ D ] 10 : 9 | 
| Answer : Option A | 
| Explanation : | 
| Required ratio = 900 : 1000 = 9 : 10 | 
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