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1. |
Order 4 solutions in decreasing order of their BOD values? |
A. | Industrial water > river water > tap water > bottled water |
B. | Tap water > bottled water > river water > industrial water |
C. | Bottled water > tap water > river water > industrial water |
D. | River water > industrial water > tap water > bottled water |
Answer» B. Tap water > bottled water > river water > industrial water | |