Her answer to the question left experts in shock as she claimed to have prepared for two years for the examination.
A video of Ruby Rai, a student of Vishun Rai College in Hajipur, went viral on social media as she, pronounced political science as 'prodigal science' and described it as a subject on cookery. Rai scored 444/500 marks to top the IA exams. Her fake success in Class 12 exam (Arts stream) brought bad name to the state.
Rai was arrested on Saturday when she appeared for a re-test at the Bihar School Examination Board (BSEB) office.
"Special Investigation Team (SIT) of Bihar police probing into the Bihar toppers scam has arrested Rubi Rai when she finally appeared for a re-test at BSEB office," a police official was quoted as saying.
A total of 14 students were called for a re-test by the BSEB after a news channel broadcast a sting in which not only Rubi Rai but Saurabh Shreshtha, a Science topper, said: "Most reactive element in the periodic table is aluminium".
According to police officials, the Patna civil court has issued a non-bailable warrant of arrest against four toppers including Rubi Rai.
The V.R. college director-cum-principal Bachcha Rai was arrested early this month and was lodged in Beur jail in Patna. The former board chairman Lalkeshwar Prasad and his wife, and former Janata Dal-United (JD-U) MLA Usha Sinha were also arrested in connection with the scam.