जब कोई वस्तु दो समान्तर समतल दर्पणों के बीच रखी जाती है, तो कितने प्रतिबिम्ब बनते हैं?

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?