कृषि योग्य मिट्टी व्यावहारिक रूप से तब अनुपजाऊ हो जाती है जब उसका pH मान निम्नलिखित में से किस स्तर के आसपास पहुँच 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?