निम्नलिखित में से कौन सा प्रमेय बताता है कि प्रत्येक वर्ग आव्यूह (square matrix) अपने स्वयं के अभिलाक्षणिक समीकरण (characteristic equation) को संतुष्ट करता 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?