Respuesta :
[tex]\huge \mathbb \red{hey \: there}[/tex]
The sentence which contains an interjection is the second one.
Explanation:
Interjection is a type of word or expression that occurs suddenly of it's own and have some feeling. As,in the second second sentence there is word "Hurrah!" which is a sudden feeling of happiness, so it an interjection.
Hope it helps!