निम्नलिखित में से किस पर्य – McqOptions

MCQOPTIONS

1.	निम्नलिखित में से किस पर्यावरण प्रदूषक में जैव आवर्धन की समस्या है?
A.	SO2
B.	NO3
C.	एचजी कवकनाशी
D.	O3 and CO2
Answer» B. NO3

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