निम्नलिखित में से किस खाद्य योजक (food additive) का प्रत्यक्ष रूप से पोषक मूल्य (nutritive value) होता 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?