मूर्त रूप से 'निर्वाण' शब्द निम्नलिखित में से किस धर्म से जुड़ा हुआ 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?