वृक्क (किडनी) में बनने वाली पथरी मुख्य रूप से किस रासायनिक पदार्थ की बनी होती है?

Mahatma Gandhi's last fast unto death in 1948 was primarily against which of the following?

What was the primary meaning of 'Swaraj' as popularized by Mahatma Gandhi during India's independence movement?

What was one major impact of India’s independence on its economy?