Muzaffarnagar's Karishma Arora and Ghaziabad's Hansika Shukla scored 499 marks out of 500 each to become joint-all-India topper of CBSE Class 12 exam, the result of which was declared today. Around 13 lakh students had registered for the exam, which saw an overall pass percentage of 83.4%. The results were declared within 28 days of the last exam.