Which ruler of the Achaemenid Empire is known for organizing and improving the infrastructure of the Persian Empire?

Which ruler converted to Buddhism and played a major role in spreading it?

What major invention was developed during the Han Dynasty?

Which famous Chinese philosopher was a contemporary of the Han Dynasty?

Where did the Silk Road begin?

What was one of the main commodities traded along the Silk Road?

What is the term for the ultimate goal in Buddhism?

Who is considered the founder of Buddhism?

What is the lowest caste in the traditional caste system of India?

What is the highest caste in the traditional caste system of India?