

MCQOPTIONS
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1. |
*/*_Standard BOD is measured at? |
A. | 20°C - 1 day |
B. | 25°C - 3 day |
C. | 20°C - 5 day |
D. | 30°C - 5 day |
Answer» D. 30¬¨‚àûC - 5 day | |