Odd column

1 1

14

20

29

4 1

The rule is

1 1+(3)= 14

14+(6)=20

20+(9)=29

29+( 12)=4 1, the odd number of columns plus 3, 6, 9, 12 is equal to the next odd number of columns in turn, and 3, 6, 9 and 12 are multiples of 3 respectively.

According to the law of odd-numbered columns, even-numbered columns are multiplied by 1, 2 and 3 by 4 respectively, that is, 4,8, 12, and the final result is 27. The process is as follows.

3+(4)=7

7+(8)= 15

15+( 12)=27

There is no choice. Maybe the title was copied wrong or wrong.