निम्नलिखित पर्यावरण दिवसों को उनकी सही तिथियों से सुमेलित कीजिए: 1. विश्व पर्यावरण दिवस – a. 2 फरवरी 2. विश्व ओजोन दिवस – b. 22 अप्रैल3. विश्व आर्द्रभूमि दिवस – c. 5 जून4. पृथ्वी दिवस – d. 16 सितंबर

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?