Identify the mineral on the basis of the following characteristics: I. It is usually a greenish crystal. II. It is often found in basaltic rocks. III. Magnesium, iron, and silica are its major elements.

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?