National Institute of Open Schooling (NIOS) has declared Secondary Exams (April-2012) Result today on 12th June, 2012. Results are available in below websites.
http://www.results.nios.ac.in/
http://www.indiaresults.com
http://www.examresults.net
http://www.exametc.com
Also, you check your results in mobile through SMS. Here are details to get results in SMS.
Type – NIOS10and send it 5676750 OR 56263