The Arvind Kerjriwal-led government brought out the advertisements in English newspapers today to commemorate the adoption of the Constitution by the Constituent Assembly of India on November 26, 1949.
However, in the text of the Preamble appearing in it, the two words were missing.
"Delhi government apologises for an error of missing words in its advertisement published in the English newspapers on the Constitution Day celebrations on Thursday.
Deputy Chief Minister Manish Sisodia also admitted the gaffe and emphasised that sanctity of "each word" written in the Indian Constitution need to be preserved.
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"It was not an oversight, it was a big mistake. The government has ordered inquiry and have sought report within four days. Whoever committed the mistake won't be spared," he said.
Kejriwal could not attent the event due to ill-health.
"When mistakes are committed responsibility needs to be fixed as well. We will have to ensure that we fight for the sanctity of each word and principles of the constitution just like we treat the tricolour.
The government further said that the Director (of Information and Publicity) has been asked to ascertain how such important components of the Preamble of the Constitution went missing from the text.