Q. Who ruled Oudh between 1827 and 1837?
Answer: Nasir-ud-Din Haidar Shah
Notes: Nasir-ud-Din Haidar Shah ruled Oudh (Awadh) from 1827 to 1837. He died without a legitimate heir, leading to a succession crisis. His reign is noted for political instability and British influence in Oudh affairs increased during his rule.