Check all of the correct name for the object pictured below.

[tex]\ \textless \ -----P---------------Q[/tex]

PQ>[tex]PQ--\ \textgreater \ \\\ \textless \ --PQ--\ \textgreater \ \\^-QP^-\\^-PQ^-\\\ \textless \ --QP--\ \textgreater \ \\QP--\ \textgreater \ [/tex]