Take a small matrix
1 2
3 4
now trace the iteration
i=1,j=1 //no change in matrix cz a[i,j]=a[j,i]
i=1,j=2 // resultant matrix
1 3
2 4
i=2,j=1 //resultant matrix
1 2
3 4
i=2,j=2 //no change in matrix cz a[i,j]=a[j,i]
we get the original matrix as it is So, Option A is Ans.