खनिजों की कठोरता में वृद्धि मुख्य रूप से किससे प्रभावित होती है? I. संयोजकता में वृद्धि II. परमाणु संकुलन घनत्व में वृद्धि III. बंध सामर्थ्य में वृद्धि IV. आयनन ऊर्जा में वृद्धि निम्नलिखित विकल्पों में से सही उत्तर चुनें:

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?