चिनाई की दो समानांतर परतों (leaves) से बनी दीवार, जो एक निरंतर वायु स्थान (air space) द्वारा अलग होती है, 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?