Which musical instrument has four strings?

A bass has 4 or 5 strings

a tenor guitar also has 4 strings so I understand why alot of people answer guitar

martin, I've never heard of a tenor guitar, is it a Spanish guitar? Electric base guitars have only 4 strings

I enjoy listening to the violin 🎻

Since "ukulele" wasn't among the answers, it had to be violin. 😁