Which one of the following dynasties was ruling over North India at the time of Alexander's invasion?

1. Alexander's invasion of India occurred around 327-326 BCE. 2. At that time, the dominant power in North India, specifically the Magadha empire, was the Nanda dynasty. 3. The Nanda ruler at the time was Dhana Nanda, known for his large army, which is often cited as a reason why Alexander's troops were reluctant to advance further east. 4. The Maurya dynasty, founded by Chandragupta Maurya, overthrew the Nandas shortly after Alexander's departure. 5. The Sunga and Kanva dynasties ruled much later, after the decline of the Mauryan Empire.