Name the only Malaysian state which was once ruled by a Queen?

Many of my Malaysian friends are quite surprised when they find out that I know so many obscure fact about Malaysia even though I was not born here. So I thought it would be a great idea to share what I know about this beautiful country by asking you a Quiz about Malaysia regularly. This was my first quiz on my Facebook page.

The answer is Kelantan. It was the only place in Malaysia to ever have a Queen as a ruler - Cik Siti Wan Kembang. Here is a pic.
Also, Kelantan is the only place in Malaysia where the King was killed by his wife in anger. Puteri Saadong who was the adopted daughter of Cik Siti Wan Kembang, killed her husband Raja Abdullah with her hair pin, for not keeping his promise.

Sorry, I do not have a higher resolution image. Please let me know if have one.