पराश्रव्य तरंगें मनुष्यों द्वारा नहीं सुनी जा सकतीं क्योंकि उनकी आवृत्ति सीमा होती 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?

Which of the following viceroys of India is associated with the 'Ilbert Bill' controversy?