वह परिघटना जिसमें कोई ध्वनि अपने आस-पास की ध्वनि के समान हो जाती है, क्या कहलाती 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?