निम्नलिखित में से कौन सा सामाजिक-सांस्कृतिक परिसर (cultural complex) सीधे कृषि अनुष्ठान समारोहों से संबंधित नहीं 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?