पौधों से प्राप्त होने वाला कौन सा कार्बनिक यौगिक मच्छर भगाने वाली दवाओं (प्रतिकर्षी) में मुख्य रूप से उपयोग किया जाता है?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?