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>> Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________...
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Q. Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________ micro gram (μ g)/litre?
a.
22
b.
42
c.
332
d.
1050
ANSWER: 42
Answer & Explanation
No explanation is available for this question!
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