अमृतसर में अकालियों द्वारा शिरोमणि गुरुद्वारा प्रबंधक कमेटी (SGPC) की स्थापना औपचारिक रूप से किस तिथि को की गई थी?

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?