Democratic Youth Federation of India (DYFI) and Students Federation of India (SFI) activists took out a procession from College Street to Moulali crossing in Central Kolkata, waving placards, flags and shouting slogans against 'incompetent' Mamata Banerjee government. They also burnt the effigy of Education minister Partha Chatterjee.
The police said the procession led to a huge traffic snarl for over three hours in central Kolkata.
The decision to defer the exam was taken after two bags of question papers went missing from a Hooghly-bound bus.
The minister asked his officials to take steps against alleged lapses by the postal department.
More than 23 lakh candidates had applied for the Primary TET examination.