Q. When did British North-Western Provinces become part of United Provinces of Agra and Oudh?
Answer: 1902
Notes: In 1902, the British merged North-Western Provinces and Oudh, forming United Provinces of Agra and Oudh. This province existed under this name until 1937, after which it was renamed United Provinces. The region now mainly corresponds to present-day Uttar Pradesh and Uttarakhand.