Shut down Telegram group for undue help during open book exams: DU By IANS | 0 Views Telegram. (File Photo: IANS). Image Source: IANS News New Delhi, June 9 : Delhi University (DU) has written a letter asking social media app Telegram to shut down a specific group on the app through which students were being allegedly told the answers to questions asked in the online open book examination held by the university. Open book examinations in Delhi University have started from Monday and have been conducted only for the final year students. These examinations have been conducted for all the three categories of students -- Regular, School of Open Learning (SOL) and Non-Collegiate Women's Education Board (NCWEB).