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JEEMAIN and NEET
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Chemistry
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Environmental Chemistry
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Q)
Three samples of water A,B and C have the D.O levels of 4ppm,and 3.8ppm and 2.1ppm respectively the most polluted sample of water is
(
a
)
C
a
n
n
o
t
b
e
p
r
e
d
i
c
t
e
d
(
b
)
B
(
c
)
C
(
d
)
A
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