Which of the following is a balanced chemical equation? $\text{Pb}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}} \to \text{PbO }+{\text{NO}}_{\text{2}}+{\text{O}}_{\text{2}}$ is _______. 

$\text{Pb}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}} \to 2\text{PbO }+4{\text{NO}}_{\text{2}}+{\text{O}}_{\text{2}}$

$\text{2Pb}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}} \to 2\text{PbO }+{\text{NO}}_{\text{2}}+{\text{O}}_{\text{2}}$ 

$\text{Pb}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}} \to 2\text{PbO }+{\text{NO}}_{\text{2}}+{\text{O}}_{\text{2}}$ 

$\text{2Pb}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}} \to 2\text{PbO }+4{\text{NO}}_{\text{2}}+{\text{O}}_{\text{2}}$