The choices for both drop down menus are:

1) not adding the ith item to the knapsack

2) adding the ith item to the knapsack

In the 0-1 knapsack recurrence formula f(x,i) = max{ v; + f[x-W;, i-1] f[x, i -1] } The first part vi + f[x-W;, 1-1) represents: [Select] The second part f[x ,i-1] represents: [Select]