Where is the office of the Uttar Pradesh Public Service Commission located?

The correct answer is B, Prayagraj. The Uttar Pradesh Public Service Commission has its office at Prayagraj, the city formerly called Allahabad, which is also the principal seat of the High Court of the state. In its present form the commission descends from the Public Service Commission of the United Provinces set up under the Government of India Act, 1935, and it now functions under Articles 315 to 323 of the Constitution.

Option A, Lucknow, is the capital of Uttar Pradesh and the seat of the Vidhan Bhavan, the Secretariat and a permanent Bench of the High Court, which is exactly why it is the most tempting wrong answer; the Public Service Commission, however, is not there. Options C and D, Kanpur and Varanasi, are major cities of the state but have no connection with the commission. A simple way to hold the geography is this: the legislature and the government sit at Lucknow, while the High Court and the Public Service Commission sit at Prayagraj.