Explanation:

None of the above 

• Rajgir, initially known as Girivraj, served as the first capital of the ancient Mahajanapada, Magadha.
• Situated in present-day Bihar, India, it was strategically located in a valley surrounded by rocky hills, fostering trade, culture, and learning.
• Rajgir was a political, economic, and religious center, frequented by figures like Lord Buddha.
• The First Buddhist Council was held at Rajgir, also known as Rajagaha, in the Sattapanni Cave, shortly after the passing away of Buddha. This council was convened around 483 BCE under the patronage of King Ajatashatru of Magadha and was presided over by Mahakassapa, one of Buddha's foremost disciples.
• The famous Gridhakuta Hill in Rajgir was the site of many of Buddha's sermons and teachings.
• The development of Rajgir as the capital of Magadha marked the rise of the Magadhan Empire as a dominant power in ancient India.
• Over time, Magadha expanded its territory and influence, eventually becoming one of the most powerful kingdoms in the Indian subcontinent.

Some of the prominent rulers of Magadha who had their capitals at Rajgir include:

• Bimbisara: He was one of the early rulers of Magadha and played a significant role in expanding the kingdom's territory and influence.
• Ajatashatru: The son of Bimbisara, Ajatashatru succeeded him as the ruler of Magadha. He further expanded the kingdom's boundaries and fortified Rajgir, making it a formidable stronghold.
• Udayin: Udayin was another notable ruler of Magadha who shifted the capital from Rajgir to Pataliputra (modern-day Patna) during his reign.
• Chandragupta Maurya: One of the most famous rulers of Magadha, Chandragupta Maurya, established the Mauryan Empire, with Pataliputra as its capital. However, Rajgir continued to hold significance during his reign.
• Ashoka the Great: Ashoka, the grandson of Chandragupta Maurya, ruled over a vast empire that included Magadha. He is renowned for his efforts to spread Buddhism and promote peace and tolerance throughout his empire.