Which Magadha ruler murdered his father to ascend the throne and in turn was murdered by his own son?

Ajatshatru

The correct answer is Option 1- Ajatshatru

The Magadha ruler who murdered his father to ascend the throne and in turn was murdered by his own son is Ajatashatru.

Ajatashatru was the son of Bimbisara, the king of Magadha in the 6th century BCE. He was ambitious and ruthless, and he was determined to become king. In 491 BCE, Ajatashatru conspired to overthrow his father and seize the throne. He imprisoned Bimbisara and eventually had him killed.

Ajatashatru ruled Magadha for 32 years. He was a skilled military commander and expanded the Magadh Kingdom through a series of conquests. He also built many forts and fortifications to defend the kingdom.

Ajatashatru was a patron of Buddhism and Jainism. He is said to have been a friend and supporter of the Buddha. He also built many Buddhist and Jain temples and monasteries.

In 459 BCE, Ajatashatru's son, Udayin, conspired to overthrow him and seize the throne. He imprisoned Ajatashatru and eventually had him killed.