Backtracking on Data Structure and Algorithms related Questions and Answers

Question :   Of the following given options, which one of the following is a correct option that provides an optimal solution for 4-queens problem? 1. (3,1,4,2) 2. (2,3,1,4) 3. (4,3,2,1) 4. (4,2,3,1) Answer :   1 - (3,1,4,2)