किस विशिष्ट मृदा संस्तर (हॉराइजन) को 'अपक्षालन परत' (इलुविएशन लेयर) के रूप में भी जाना जाता है, जो सिलिकेट, मिट्टी, लोहा और एल्युमीनियम जैसे खनिजों के निक्षालन द्वारा लक्षित होता है?

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?