The correct options are
A Purana Qila, Delhi
B Hastinapura, Meerut
C Atranjikhera, Etah
Rajas who performed big sacrifices became the rajas of Janapadas. Archaeologists excavated a number of settlements in the Janapadas. Some of these were Hastinapura, near Meerut, Atranjikhera, near Etah and Purana Qila in Delhi.