The four important dynasties that stand out prominently in the sixth century B.C. are :

A. The Guptas, the Ikshvakus, the Pauravas and the Mauryas.

B. The Haryankas, the Guptas, the Pauravas and Pradyotas.

C. The Haryankas, the Ikshvakus, the Pauravas and the Mauryas.

D. The Haryankas, the Ikshvakus, the Pauravas and Pradyotas.

Answer: Option D

Solution(By Examveda Team)

The Haryankas of Magadha, the Ikshvakus of Kosala, the Pauravas of Vasta and Pradyotas of Avanti.