She scored 63 in English, 84 in Assamese, 60 in Advanced Assamese, 75 in Political Science, 67 in Education and 46 in Geography.
CGBSE chairperson said the total pass percentage in the Class XII exams was 78.43 per cent while it was 68.20 per cent for the Class X exams.
CBSE Class 12 results out: Girls outperform boys as 83.4 per cent pass; Hansika Shukla, Karishma Arora bag top ranks
Delhi Chief Minister Arvind Kejriwal's son Pulkit Kejriwal scored 96.4 per cent and Union Minister Smriti Irani's son Zohr Irani secured 91 per cent marks.
Boomika has scored 99 marks each, in Economics and Commerce subjects and aspires to join Indian Revenue Service.
A total of 10,98,891 candidates from 10,678 schools registered for exams, which is a 2.82 per cent point increase from that of 2016.