Explanation:

Let's break it down:

- Let's see the coding logic.

- In 'CURD' = '342184'

- C = 3

- U = 21

- R = 18

- D = 4

- So, C U R D ? 3 21 18 4

- In 'BREAD' = '2181024'

- B = 2

- R = 18

- E = 5? But in code, it's 10 - notice E's code is 10 (E is 5th letter, maybe it's doubled)

- A = 1? In code, it is 2... Possible pattern: every vowel's value is doubled?

- D = 4

- R ? 18, E ? 10, A ? 2 (A is 1st letter, so doubled is 2), D ? 4

- So, B R E A D ? 2 18 10 2 4

- But code is: 2 18 10 24, looks like A D combined as 24 (2 and 4 together as 24), not 2 and 4 separate.

- For 'BUTTER'

- B ? 2

- U ? U is 21

- T ? T is 20

- T ? 20

- E ? 10 (E is 5, doubled = 10)

- R ? 18

- So: B U T T E R ? 2 21 20 20 10 18

- Now, look at the options:

1. 2212020518

2. 421201018

3. 442201018

4. 24220201018

- Closest matching is Option 4: 24220201018

- But this is: 2 4 2 20 20 10 18. There is an extra 4 after the starting 2 (for B).

- The correct code, based strictly on patterns, should be 2 21 20 20 10 18.

Comparison:

- 22120201018 (This is Option 1: 2 21 20 20 10 18) matches exactly.

- Option 4: 24220201018 does not match.

Therefore,

Correct answer is Option 1: 22120201018

-

Summary:

- Each consonant gets its usual alphabetical number.

- Vowels get their number doubled.

- Combine all values in order to form the code.

- Option 1 fits this pattern for 'BUTTER'.

- Option 4 has extra/incorrect numbers.