The spell that causes an unconscious person to awaken
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Ennervate
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Obliviate
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Alohomora
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dissendium
A
Correct answer
Explanation
Ennervate (Rennervate in UK editions) is the reviving spell used to awaken unconscious people. It's the counter-spell to Stupefy. Obliviate erases memories, Alohomora unlocks doors, and Dissendium opens secret passages. Dumbledore uses Ennervate on Harry after he falls off his broom.