Seeking to turn the tables on the BJP over the Class 12 Board exam scam, Bihar Deputy Chief Minister Tejaswi Yadav on Sunday said it is union minister Giriraj Singh who has a close association with the prime accused, Bachcha Rai.Rai is the director-cum-principal of the V.R. College in Vaishali district which is being investigated in the case.The Bharatiya Janata Party had earlier said that Bachcha Rai has not only been an acive Rashtriya Janata Dal (RJD) worker, but worked diligently to ensure victory of Lalu Prasad's sons Tejaswi Yadav and Tej Pratap from Raghopur and Mahua seats in Vaishali, respectively.Tejaswi, who is younger son of RJD chief Lalu Prasad, posted on Twitter account some photos of Bachcha Rai with union minister and BJP leader Giriraj Singh. He said Prime Minister Narendra Modi's "favourite minister" is with Rai, the mastermind of the Class 12 Board merit list scam.Giriraj Singh is "business partner and family friend of prime accused of the Class 12 Board merit list scam," tweeted Tejaswi.Tejaswi's party RJD has also said that Giriraj Singh had promised to help Rai set up a medical college.