Which is not correctly matched? I) Basic strength of oxides `Cs_(2)OltRb_(2)OltK_(2)OltNa_(2)OltLi_(2)O` II) Stability of peroxi

Which is not correctly matched?
I) Basic strength of oxides
`Cs_(2)OltRb_(2)OltK_(2)OltNa_(2)OltLi_(2)O`
II) Stability of peroxides
`Na_(2)O_(2)ltK_(2)O_(2)ltRb_(2)O_(2)ltCs_(2)O_(2)`
III) Stability of biocarbonate
`LiHCO_(3)ltNaHCO_(3)ltKHCO_(3)ltRbHCO_(3)`
IV) Melting point `NaFltNaClltNaBrltNaI`
A. 1 and 4
B. 1 and 3
C. 1 and 2
D. 2 and 3

Which is not correctly matched? I) Basic strength of oxides `Cs_(2)OltRb_(2)OltK_(2)OltNa_(2)OltLi_(2)O` II) Stability of peroxides `Na_(2)O_(2)ltK_(2

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