शराब त्रासदियों में जिनके परिणामस्वरूप अंधापन या मृत्यु होती है, मुख्य हानिकारक पदार्थ कौन सा 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?