Hello raju,
You have secured 45 percentile and according to previous year trend it's difficult to predict that you will qualify for je advance or  not.
Previous year jee main percentile cutoff for eligible to appear in jee advance is 54.012 for the sc category students.
You should wait for this year cutoff it may goes up or down.you can also try for other options available.
For more information you can visit https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff/amp
Hope this helps you.

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