In which year did the annexation of Awadh by Lord Dalhousie take place?

The correct option is 1856.

Step-by-Step Explanation:

1. Background: Awadh (Oudh) was a kingdom in northern India. Lord Dalhousie served as the Governor-General of India from 1848 to 1856.

2. Reason for Annexation: Lord Dalhousie annexed Awadh under the pretext of misgovernance (alleging that the ruler Nawab Wajid Ali Shah was incapable of ruling effectively), rather than using the Doctrine of Lapse.

3. Year of Annexation: The official annexation of Awadh took place in February 1856. This event caused widespread discontent among the native population and soldiers, becoming one of the major political triggers for the Revolt of 1857.