The lower value is the guaranteed result for Player I, the upper value is the guaranteed result for Player II. Player II, by choosing a column, minimizes the obtained element. Considering this, player needs to analyze each column to find the upper value on each column and then choosing the minimum among those numbers will give him the result. Each column has the upper value 5 and 6 respectively. So min {5,6}=5 is obtained hence the correct answer is D.