फ्लाई एश (Fly ash) एक पर्यावरणीय प्रदूषक है जो मुख्य रूप से किसके द्वारा उत्पन्न होता 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?