Ancient Indian History GK Part 1: Copper, used most widely by the Harappans, was obtained from- Khetri mines. The term ‘Vishti’ stands for- Forced Labour. Who propounded the Madhyamika school of Buddhist philosophy, popularly known as Sunyavada- Nagarujana. Which ‘Pitaka’ contains the profound philosophy of the Buddha’s teachings- Abhidhamma Pitaka. The Buddha delivered his first