The Sales Tax officers work in which of the following cities?

Study the following information carefully and answer the questions below-: There are six officers Aman, Rajat, Arun, Kapil, Monu and Raja who work in three different departments of Central Government, viz Income Tax Department, Sales Tax Department and Customs Department. Out of these six, three officers work in Income Tax Department, two in Sales-Tax Department and one in Customs Department. Each officer has one city as his jurisdiction. Three officers work in Dehradun, two in Delhi and one in Lucknow. No Income Tax officer has Delhi as his jurisdiction. Two Sales Tax officers work in different cities. The Income Tax officer works in Lucknow. Arun, who is not in Sales Tax department, works in Delhi. Aman does not have Dehradun as his jurisdiction and he does not work in Income Tax department. Monu and Raja work in different departments. Rajat and Kapil are officers in the same department but in different cities. Monu does not work in Income Tax Department and Kapil does not have Lucknow as his jurisdiction.