RRB ALP 2013 પ્રશ્ન 22
પ્રશ્ન: હવાના પ્રદૂષણનો મુખ્ય પરિબળ છે:
વિકલ્પો:
A) લેડ
B) કોપર
C) ઝિંક
D) ગોલ્ડ
Show Answer
જવાબ:
સાચો જવાબ: A
BETA
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