\item \lect Let $p, q$ and $r$ be a atomic propositions. Tick all statements that are true.

\begin{itemize}
\item[$\square$] "$\lnot p \land \lor \enspace q$" is a propositional formula.
\item[$\square$] "$(p \land q) \lor (r \imp p)$" is a propositional formula.
\item[$\square$] "$\lnot p$" is a propositional formula.
\item[$\square$] "$\lor$" is a propositional formula.
\item[$\square$] "$p$" is a propositional formula.

\end{itemize}