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				| 1. | Afive day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is | 
| A. | 100 | 
| B. | 1000 | 
| C. | 5000 | 
| D. | 10000 | 
| Answer» E. | |