The diagram gives some of the energy levels of a hydrogen atom.
The transition of an excited hydrogen atom from E$_3$ to E$_1$ causes a photon of visible light to be emitted.
Which transition causes a photon of ultraviolet light to be emitted?

1 )
E$_4$ to E$_3$
2 )
E$_3$ to E$_2$
3 )
E$_2$ to E$_1$
E$_1$ to E$_0$
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