निम्नलिखित प्राकृतिक रूप से पाए जाने वाले तत्वों में से किसे पृथ्वी की पपड़ी (भूपर्पटी) में सबसे दुर्लभ माना जाता 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?