मुख्य रूप से भारत के तटीय क्षेत्रों में पाई जाने वाली मोनाज़ाइट रेत से कौन सा रेडियोधर्मी तत्व मुख्य रूप से निकाला जाता 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?