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There is a hidden iframe in your site – possibly malware/hacked. If your site is hacked, you need to start working your way through these resources:
https://codex.www.ads-software.com/FAQ_My_site_was_hacked
https://www.ads-software.com/support/topic/268083#post-1065779
https://smackdown.blogsblogsblogs.com/2008/06/24/how-to-completely-clean-your-hacked-wordpress-installation/
https://ottopress.com/2009/hacked-wordpress-backdoors/

Anything less will probably result in the hacker walking straight back into your site again.

Additional Resources:
https://codex.www.ads-software.com/Hardening_WordPress
https://sitecheck.sucuri.net/scanner/
https://www.unmaskparasites.com/
https://blog.sucuri.net/2012/03/wordpress-understanding-its-true-vulnerability.html

Thank for your reply,

I removed the code and i check it.. now the website is clean,,,, and i resubmitted domain in Google webmaster again last day… but still now i can’t see the index page in Google search result…. help me please

Here are your indexed pages – probably from cache. You may resubmit a new sitemap too and look for indexed pages and other pages that Google reports with problems. And seek help in your Webmaster Tools help links as indexing, ranking, etc. are NOT WordPress problems.