निम्नलिखित में से कौन सा समूह भारत में प्रमुख लौह अयस्क खनन क्षेत्रों का प्रतिनिधित्व करता 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?