Raksha, a student of Amity International School from Noida, secured 99.6 per cent marks. She is an arts student.
Talking to ABP News, Raksha said she's delighted with her performance.
"I was confident of securing good marks but never thought I would be all-India topper. My strategy was to focus on all the subjects. My school and teachers helped a lot in what I have achieved," she said.
"I want to do political science honours. Once I am in college will decide what to do in future," she said.
Raksha's mother said she was not under any kind of pressure of securing good marks.
"I have been an emotional support and helping her in whatever way I could. She's very systematic in her work," she said.
Principal of Amity International School said she expected Raksha to be be among the toppers.
"We have already prepared a list of expected toppers from our school and I was very sure about Raksha. We are grateful to God Almighty that she has become India topper," she said.
Bhumi Sawant De from DAV, Chandigarh is second in the list with 99.4 percent followed by Aditya Jain from Bhawan Vidyalaya, Chandigarh with 99.2 percent and Mannat Luthra from Bhawans Vidya Mandir, Chandigarh with 99.2 percent.
HRD Minister Prakash Javadekar has spoken to CBSE Class XII toppers in all three streams of Science, Commerce and Humanities.
About 10,98,981 students appeared in the class 12 examinations this year, according to the board. A total of 6,38,865 boys and 4,60,026 girls appeared for the Class 12 examination held between Martch 9 to April 29.
Overall pass percentage is 82 percent, while it was 83 percent last year. Around 11 lakh students have appeared for the CBSE Class 12 exam.
(With inputs from agencies)