A) \[\text{3}\times \text{1}{{0}^{\text{3}}}\text{years}\]
B) \[\text{F}{{\text{e}}_{\text{2}}}{{\text{O}}_{\text{3}}}\]
C) \[\text{Pb}{{\text{O}}_{\text{2}}}\]
D) \[\text{P}{{\text{b}}_{\text{3}}}{{\text{O}}_{\text{4}}}\]
Correct Answer: A
Solution :
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