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BOD value of clean and polluted water:...

BOD value of clean and polluted water:

A

Clean BOD `gt` 17 and polluted `lt` 16

B

Clean BOD `gt` 5 and polluted `gt` 18

C

Clean BOD `lt` 5 and polluted `gt` 15

D

Clean BOD `gt` 18 and polluted `lt` 20

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