Answer:
Carbon and Lead make the most sense
Explanation:
None of them are in the same group but carbon and lead are in the same column. Hydrogen is an other non-metal and Helium is a noble gas, Lithium is an Alkali metal and Beryllium is an Alkaline earth metal, Carbon is an other non-metal and Lead is a Post-transition metal, Gallium is Post-transition metal and Germanium is a Metalloid. So none of the pairs are in the same group, but carbon and lead do share the same column.
