Which of the following dynasties was the oldest ruling dynasty of ancient India?

The Satavahanas (also called Satvahanas) ruled from the 1st century BCE to 3rd century CE, making them the oldest dynasty among the options. Rashtrakutas and Chalukyas ruled much later (7th-10th century CE), while Pallavas emerged in the 4th century CE. The Satavahanas controlled the Deccan region after the Mauryan decline.