Answer:
(b, d) Alkali metals possess
high negative electrode potentials and large atomic size
\[\underset{{{E}^{{}^\circ
}}}{\overset{{}}{\mathop{{}}}}\,\,\,\,\,\,\,\underset{-3.04}{\mathop{Li}}\,\,\,\,\underset{-2.71}{\mathop{Na}}\,\,\,\underset{-2.93}{\mathop{\,K}}\,\,\,\,\underset{-2.93}{\mathop{Rb}}\,\,\,\,\underset{-2.92}{\mathop{Cs}}\,\]
Act as strong reducing agents.
\[\underset{At.radii\,(pm)}{\overset{{}}{\mathop{{}}}}\,\,\,\,\,\,\,\underset{152}{\mathop{Li}}\,\,\,\,\underset{186}{\mathop{Na}}\,\,\,\underset{227}{\mathop{\,K}}\,\,\,\,\underset{248}{\mathop{Rb}}\,\,\,\,\underset{265}{\mathop{Cs}}\,\]
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