Concept:Add all numbers in each column and verify if the sum equals a perfect square.Explanation:Column A: 6+11+8=25. 25 is 52, a perfect square.Column B: 1+4+3=8. 8 is not a perfect square.Column C: 5+2+11=18. 18 is not a perfect square.Column D: 8+4+1=13. 13 is not a perfect square.Only Column A gives a perfect square sum.