If an extra column or row is added to the table, the second term will be 20 because the second term in every row and column is twice the first (2*1=2, 2*2=4, ..., 2*8=16, 2*9=18, 2*10=20). Answer B.
The table has two errors: column 4 row 7 should be 28 not 27; column 9 row 4 should be 36 not 26.