Congragulations! You have been appointed as the District Magistrate of city X. You visit a government school on your first day of inspection of city X. You are shocked to see very less number of female students compared to male students in the school. Which of the following metrics would you order the officials to survey on in order to make a report on the issue and find a solution? You also set city Y as your ideal target to achieve the aforementioned metrics. Because city Y has exactly the same number of male and female population. Identify the corresponding metric and city Y.