आर्थिक विकास के 'असंतुलित विकास मॉडल' (unbalanced growth model) का प्रतिपादन सबसे पहले व्यवस्थित रूप से निम्नलिखित में से किस अर्थशास्त्री द्वारा किया गया 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?