Practice questions without fighting the page.

National Space Day, declared by Prime Minister Modi in 2024, is celebrated annually on August 23 to honour ISRO's milestone lunar mission.

"held back": to refrain from revealing.

<div class="ai-exp-block"> <b>Explanation:</b> <p>Assam’s major coalfields belong to the Tertiary coalfields group, which are younger than the ancient Gondwana coal deposits. The Assam coal seams formed during the Tertiary period, making them part of the Tertiary coalfields classification. The other options refer to different coal basins: Gondwana coalfields are older and spread across central/north India, Damodar and Neyveli are in different regions with distinct geological histories.</p> </div> <div class="ai-did-block"> <b>? Did You Know?</b><br> <p>The main geological division for Indian coal is Gondwana and Tertiary, with most large, well-known coalfields from the Gondwana era and more localized Tertiary fields like Assam.</p> </div> <div class="ai-remember-block"> <b>? Remember:</b> <p>Assam coalfields are from the Tertiary period, not Gondwana.</p> </div>