Hello, Shilpa Chatur, and welcome to Wikipedia! I hope you like the place and decide to stay. Here are some pages that you might find helpful:
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 How to write a great article
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Also, when writing an article, you will want to avoid wholesale copying of what someone else wrote.  I noticed that the article in your sandbox didn't cite any of the sources that some of the paragraphs were from, so I added the proper references.