"प्रत्येक पूर्ति अपनी माँग स्वयं पैदा करती है" यह प्रसिद्ध आर्थिक नियम किसने प्रतिपादित किया था?

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?