आधुनिक आवर्त सारणी में, एक ही ऊर्ध्वाधर समूह (group) में मौजूद तत्वों में ______ की संख्या समान होती 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?