स्वचालित वाहन निर्वातक का – McqOptions

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1.	स्वचालित वाहन निर्वातक का सबसे अविषालू धातु प्रदूषक है -
A.	कापर
B.	लेड
C.	कैडमियम
D.	मरकरी
Answer» C. कैडमियम

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