जलीय पारिस्थितिकी प्रणालियों पर जल प्रदूषण का प्राथमिक मुख्य प्रभाव निम्नलिखित में से कौन सा है?

The arrival of which commission in India triggered widespread protests, including mass hartals across the country in 1928?

Which of the following leaders was instrumental in initiating and leading India’s struggle for independence?