Due to diagonal relation which pair are amphoteric in nature

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${Li}_{2} O, MgO$

$BeO, MgO$

$BeO, {Al}_{2} O_{3}$

$B_{2} O_{3}, {Al}_{2} O_{3}$

answer is D.

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Detailed Solution

Aluminium chloride and water are produced when hydrochloric acid and aluminum oxide react. Aluminum Oxide has a base-like behaviour in this reaction. when sodium hydroxide and aluminum oxide mix to produce water and sodium aluminate. Aluminum oxide behaves as an acidic oxide in this process. An example of an amphoteric oxide is aluminium oxide.

Because it may react in both an acidic and a basic solution, BeO is amphoteric in nature.

Hence, the required answer is D).

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