द्वितीय पंचवर्षीय योजना के दौरान भारी उद्योगों और इस्पात संयंतों की स्थापना में किन विदेशी देशों ने भारत की सहायता की 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?