GK 1. Who first called Mahatma Gandhi the "Father of the Nation"? Netaji Subhash Chandra Bose 2. What is our national calendar? Shaka Samvat 3. What is the duration of singing the national anthem? 52 seconds 4. Who discovered radioactivity? Henri Becquerel 5.The pacemaker is related to which organ of the body? Heart 6. Which gland of the human body is called the "Master Gland"? Pituitary Gland 7. What is the purest form of carbon? Diamond 8. Who invented X-rays? Röntgen 9. Which metal was used first by humans? Copper 10. How does the outer space appear to an astronaut? Black 11. Who invented the telescope? Galileo 12. What is the name of Mahatma Gandhi's memorial in Delhi? Raj Ghat 13. Where did the first train in India run from and to? Bombay (now Mumbai) to Thane 14. In which city was metro rail service first started in India? Kolkata 15. In which year did the railways start in India? 1853 Telegram Channel : https://t.me/PSC_SREEJITH_ACADEMY WhatsApp Channel : https://whatsapp.com/channel/0029Va8t7bLAzNc1KkJpav44