Microsoft Excel सॉफ्टवेयर द्वारा बनाई गई फ़ाइलों को आम तौर पर किस रूप में जाना जाता 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?