The India king who opposed Alexander was?

The ancient name of North Bihar was

In ancient India, the earliest capital of Magadha kingdom was at-

When Alexander invaded India, who were the rulers of Magadha?

Which one of the following rulers of Magadha was the contemporary of Alexander the great?

Where was the seat of the first Rebuplic of the world in 6th century BC?

By which ruler Patliputra was chosen for the first time as a capital?

The list of sixteen Mahajanapadas is available in-