1.for i=1 to n:
2. for j=1 to n:
3. temp=A[i][j]+10
4. A[i][j]=A[j][i]
5. A[j][i]=temp-10
6. end for
7.end for
The $3,4,5$ lines swap $A [ j ] [ i ]$ and $A [ i ] [ j ]$.
The same variables are swapped twice. For eg when: $i =5$, $j = 10$. $A [10] [5]$ and $A [5] [10]$ will be swapped. They will be swapped again when $i = 10$, $j =5$.
Two times swap of same elements will lead to $A$ remaining unchanged.
Hence, E is correct.