किसी भाषा को स्वाभाविक रूप से सीखने का सबसे प्रभावी उपाय 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?