बायोगैस संयंत्रों से प्राप्त बायो-स्लरी (bio-slurry) का उपयोग कृषि में मुख्य रूप से किस रूप में सुरक्षित रूप से किया जा सकता है?

Which movement aimed to promote Khadi, a hand-spun and handwoven cloth native to India?

Who were prominent leaders associated with the initial phase of the Telangana Rebellion (1946-1951) against the Nizam's rule and feudal landlords?

What was the immediate trigger for the Revolt of 1857?