निम्नलिखित में से किस जीव को जल प्रदूषण का जैव-संकेतक (bioindicator) माना जाता है?

Which of the following events is considered a major turning point that fueled Indian nationalism during British rule due to its brutal nature and widespread condemnation?

Which of the following events is considered the first major peasant uprising against the British in India?