हालाँकि अधिकांश धातुओं के ऑक्साइड क्षारीय (basic) प्रकृति के होते हैं, लेकिन निम्नलिखित में से कौन सी धातु उभयधर्मी ऑक्साइड (amphoteric oxide) बनाती 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?