Maximum permissible concentration (i.e. TLV) of DDT in public water su – McqOptions

MCQOPTIONS

1.	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» C. 332

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