Explanation:

Let’s examine the given pattern row wise:

- First row: 3     11     2

- 3 + 2 = 5 (not 11)

- 3 × 2 = 6 (not 11)

- But, (3 × 2) + 5 = 11

- Second row: 5    11    7

- 5 + 7 = 12 (not 11)

- 5 × 7 = 35 (not 11)

- But, (5 + 7) - 1 = 11

- Third row: 13    ?     18

- Let's check (13 + 18) - 1 = 30

- Let's check pattern vertically.

- First column: 3, 5, 13

- Second column: 11, 11, ?

- Third column: 2, 7, 18

Now, let's focus on the possible options for ? considering

- For each row, check: if (first + third) - x = second

- So: For third row, (13 + 18) - x = ?

- 13+18 = 31, so if no subtraction, ? = 31

Checking with the given Options:

- Option 1: 29

- Option 2: 27

- Option 3: 33

- Option 4: 31

Among all, Option 4: 31 fits perfectly.

-  Correct Answer: Option 4, 31

- Summary:

- There's no clear multiplication/addition pattern across the digits.

- Checking the row pattern suggests middle number equals sum of first and last in third row.

- 13 + 18 = 31 matches option 4.

- Thus, 31 is the correct number to replace the question mark.