प्रकाश संश्लेषण के दौरान स्वपोषी पौधों द्वारा प्राथमिक अभिकारक के रूप में निम्नलिखित में से किस गैस का उपयोग किया 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?