At the swearing-in ceremony held at Raj Bhavan here, Chief Justice of Madras High Court, Justice Indira Banerjee administered the oath of office to Purohit.
Purohit took oath in the name of God.
Chief Minister K Palaniswami, his cabinet colleagues, and DMK Working President and Leader of Opposition in the Assembly MK Stalin, were among those present at the ceremony.
Maharashtra Governor Ch Vidyasagar Rao had been given additional charge of the state since September 2016.
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