This work on Arangan is a consolidation of talks that I heard, discussion with peers and articles that I read from the world wide web. I might have reproduced the text from other website. I have given references to the sites from where I got these materials. If someone feels I have not given due credit, please leave a comment and I would edit the post to add more references. If need be, I'll remove the post in entirety. I did not intend to infringe on any copyrights.