Memory charm used for memory modification
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memoriato
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diffindo
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obliviate
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forgetus
C
Correct answer
Explanation
The correct answer is Obliviate, which is the Memory Charm used in the Harry Potter series to modify or erase memories. It is commonly used by wizards to remove specific memories from Muggles who witness magical events. 'Diffindo' is the Severing Charm used to cut objects, 'Memoriato' and 'Forgetus' are not actual spells in the Harry Potter universe.