The Dhaka University authority has extended its online class activities till February 21 following the notification of the Education Ministry.Earlier, on January 23, DU went to the online class from offline class till February 6 due to the rise of coronavirus cases across the country."We have to abide by the laws and regulations of the country as an Institute of this country," said DU VC prof Akhtaruzzaman said. Read: 7 DU colleges & 3 universities to hold exams"Regular Classes will be hold on online platform but respective departments can take in-person exams and lab classes will be continued physically," he added.He also said that all the dormitories will remain open for students maintaining the Safety rules.Ongoing examinations for honor's fourth year and Masters will be continued  maintaining  health rules  and the offices will run in a limited range from 9 am to 1 pm.END/UNB/Corr/SIS/ssk/0035