What is the counter-charm to Lumos?

What spell extinguishes the light produced by Lumos?

1) Nox 2) Expelliarmus 3) Accio 4) Alohomora

Answer:

The counter-charm to Lumos is Nox, which extinguishes the light produced by the Lumos spell.

In the world of Harry Potter, Lumos is a spell used to produce light from the tip of the caster's wand. However, if you want to extinguish the light created by Lumos, you would use the counter-charm Nox. Saying 'Nox' after casting Lumos magically turns off the light, making it go dark again.

The other spells listed - Expelliarmus, Accio, and Alohomora - do not serve as counter-charms to Lumos. They each have different functions, such as disarming another wizard, summoning objects, or unlocking doors, respectively.