भारत ने किस वर्ष स्वदेशी रूप से निर्मित साउंडिंग रॉकेटों (जैसे रोहिणी-75) का प्रक्षेपण शुरू 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?