As per the world health organisation (WHO) specification, the maximum – McqOptions

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1.	As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m3.(μg-microgram)
A.	90
B.	10
C.	750
D.	800
Answer» B. 10

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