पहाड़ी क्षेत्रों में तीखे मोड़ों (वक्रों) पर सड़कों को चौड़ा करने का कार्य मुख्य रूप से कहाँ 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?