Chief Minister Nitish Kumar, his Deputy Tejashwi Prasad Yadav and others were present on the occasion.
Judges of Patna High Court, Bihar's Advocate General Ram Balak Mahto and a host of senior advocates and government lawyers also attended the programme.
Justice Menon was the Acting Chief Justice of Madhya Pradesh High Court before his appointment as the Chief Justice of Patna High Court.
Patna High Court Acting Chief Justice Hemant Gupta has been appointed as the Chief Justice of Madhya Pradesh High Court.
Justice Menon would retire on June 7, 2019.