Step 1: Historical background.
In 1856, the British annexed the princely state of Awadh (Oudh). The ruler at the time was Nawab Wajid Ali Shah, who was known more for his cultural pursuits than for administration.
Step 2: Doctrine of Lapse vs. Misrule.
While the Doctrine of Lapse was applied in several princely states, Awadh was annexed on the grounds of alleged “misrule.” The British claimed that the Nawab failed to provide proper governance, though in reality Awadh was a prosperous region.
Step 3: Conclusion.
Thus, the official reason given by the British for removing Wajid Ali Shah was “misrule.”
\[
\boxed{\text{Correct Answer: Due to misrule}}
\]