निम्नलिखित में से किसने प्रधानमंत्री को 'प्राइमस इंटर पेरेस' (बराबर वालों में प्रथम) के रूप में वर्णित किया था?

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?