I have just started learning ConTeXt and I have to say that I am pretty amazed by how intuitive it is to use. But I can't find a way yet to achieve automatically a list with the following labels.
C.1
C.2
C.3
.
.
.
What I have come up with so far is with the use of \sym:
\starttext
\startitemize[packed]
\sym{C.1} Three coins are tossed. In how many ways can at least 2 heads turn up?
\sym{C.2} If $\log_x 8^{1/2}=3/4$, what is $x$?
\sym{C.3} If $x:y=10:21$ and $y:z=28:9$, what is $x:y:z$?
\stopitemize
\stoptext
In LaTeX, with the enumitem package, it is easy to achieve this with the following minimal code:
\documentclass{article}
\usepackage{enumitem}
\begin{document}
\begin{enumerate}[label={C.\arabic*}]
\item ...
\end{enumerate}
\end{document}
Is there a way that I can automate the list in ConTeXt? I tried some of the ConTeXt manuals but all I have seen up to now are just the predefined lists. I also tried looking for a duplicate in this site using the [context] tag but I have been unsuccessful so far.

