Các hợp chất trong dãy chất nào sau đây đều có tính lưỡng tính?

A. $\mathrm{Cr}{\left(\mathrm{OH}\right)}_3, \mathrm{Fe}{\left(\mathrm{OH}\right)}_2, \mathrm{Mg}{\left(\mathrm{OH}\right)}_2$

B. $\mathrm{Cr}{\left(\mathrm{OH}\right)}_3, \mathrm{Zn}{\left(\mathrm{OH}\right)}_2, \mathrm{Pb}{\left(\mathrm{OH}\right)}_2.$

C. $\mathrm{Cr}{\left(\mathrm{OH}\right)}_2, \mathrm{Zn}{\left(\mathrm{OH}\right)}_2, \mathrm{Mg}{\left(\mathrm{OH}\right)}_2$

D. $\mathrm{Cr}{\left(\mathrm{OH}\right)}_3, \mathrm{Pb}{\left(\mathrm{OH}\right)}_2, \mathrm{Mg}{\left(\mathrm{OH}\right)}_2$