दिए गए विकल्पों में से कौन सा पद निम्नलिखित श्रृंखला में प्रश्नवाचक चिह्न (?) को प्रतिस्थापित करके इसे तार्किक रूप से पूर्ण बना सकता है? UC 169, WE 121, ?, AI 49, CK 25

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?