The correct answer is c) Vizianagaram.
Parvatipuram is a town in Vizianagaram district of Andhra Pradesh, India. It is the headquarters of Parvathipuram Manyam mandal in Parvathipuram revenue division.
Bobbili is a town in Vizianagaram district of Andhra Pradesh, India. It is the headquarters of Bobbili mandal in Bobbili revenue division.
Salur is a town in Vizianagaram district of Andhra Pradesh, India. It is the headquarters of Salur mandal in Salur revenue division.
Vizianagaram is a city in Vizianagaram district of Andhra Pradesh, India. It is the headquarters of Vizianagaram district and Vizianagaram revenue division. It is also the mandal headquarters of Vizianagaram mandal.