1. In the caste system, who were referred to as Laborers?
2. Who built the Indus valley cities Harappa & Mohenjodaro, more than 5000 years ago?
3. Which among these is not a most popular Vedic god?
4. On the banks of which river, the ancient Indus valley city Harappa was situated?
5. What did the Aryans of those days have for trading?