निम्नलिखित में से कौन सा शब्द या अवधारणा सिंधु घाटी सभ्यता की पुरातात्विक खोजों से ऐतिहासिक रूप से संबंधित नहीं है?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?