एक अ-तुच्छ मानकीकृत रैखिक समष्टि (non-trivial normed linear space) (X, ||.||) में, केवल वे उपसमुच्चय जो एक साथ खुले और बंद (clopen) दोनों हैं, वे हैं:

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?