पृथ्वी के इतिहास के भूवैज्ञानिक समय मापक्रम (Geological Time Scale) के अनुसार, व्यापक रूप से इतिहास को कितने प्रमुख महाकल्पों (Eras) में विभाजित किया जा सकता है?

Which of the following territories was annexed by Lord Dalhousie under the pretext of misgovernance, and not directly through the Doctrine of Lapse?

What was the primary stated reason for the Partition of Bengal in 1905 by Lord Curzon?