सवाई जयसिंह द्वितीय द्वारा स्थापित प्रथम जंतर-मंतर वेधशाला कहाँ स्थित 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?