Explanation:

To decode the pattern:

- CLASS is written as TTBMD.

- Look for a pattern in letter positions: 'C' becomes 'T', 'L' becomes 'T', etc.

Let's analyze how each letter transforms:

- Increment each letter by a specific value:

- C (3rd letter) to T (20th letter): +17

- L (12th letter) to T (20th letter): +8

- A (1st letter) to B (2nd letter): +1

- S (19th letter) to M (13th letter): -6

- S (19th letter) to D (4th letter): -15

Apply this rule to "DINOSOUR":

- D (4th) + 17 = S (19th)

- I (9th) + 8 = Q (17th)

- N (14th) + 1 = O (15th)

- O (15th) - 6 = I (9th)

- S (19th) - 15 = D (4th)

- O (15th) + unknown transformation

- U (21st) + unknown transformation

- R (18th) + unknown transformation

The pattern seems inconsistent in the example. However, let's analyze given options to find closest transformation with adjustments:

1. Option 1: SVPTPOJE

2. Option 2: SVPRPJKF

3. Option 3: SWPUPOJE

4. Option 4: SXOSPOJE

Based on the initial transformations, Option 1 is the closest fit.

SVPTPOJE takes into account probable simplified shifts.