A former chief secretary of Uttar Pradesh was on Tuesday held guilty of wrongfully allotting a plot during her tenure as Noida authority chief and sentenced to four years' imprisonment by a court here.

A special Central Bureau of Investigation (CBI) court found Neera Yadav, a retired Indian Administrative Service officer, guilty of violating the rules in allotting the industrial plot in Noida to Flex Industries Limited in 1994-95.