प्रागैतिहासिक कृषि एवं अन्न उत्पादक स्थल 'मेहरगढ़' भौगोलिक रूप से कहाँ स्थित 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?