Explanation:

- The pattern for coding MATERIAL to SZLREKZH involves shifting each letter a certain number of places backward in the alphabet.

- Each letter in MATERIAL is shifted as follows:

- M becomes S

- A becomes Z

- T becomes L

- E becomes R

- R becomes E

- I becomes K

- A becomes Z

- L becomes H

- Now, applying the same transformation to EQUATION:

- E would shift to S

- Q would shift to R

- U would shift to F

- A would shift to T

- T would shift to A

- I would shift to O

- O would shift to P

- N would shift to J

- The result is SRFTAOPJ.

- Option:4, SRFTAOPJ is the correct coding for EQUATION.

- Option:4 is the correct answer.