अनुसंधान में ऐसा संकल्पनात्मक तत्व जो विभिन्न मात्रात्मक मान ले सकता है, ________ कहलाता 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?