Water sample is called cleanest on the basis of which one of the BO...

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Water sample is called cleanest on the basis of which one of the BOD values given below
P
(a) \( 11 \mathrm{ppm} \)
(b) \( 15 \mathrm{ppm} \)
(V)
(c) \( 3 \mathrm{ppm} \)
(d) \( 21 \mathrm{ppm} \)
[JEE Main-2 021]
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