Fill in the blanks:

Meenal's drastic steps will be prejudicial ____ the growth of the institute.

to

The correct answer is Option (3) → to

The sentence should read: "Meenal's drastic steps will be prejudicial to the growth of the institute."

In this context, "to" is used to indicate the relationship between Meenal's drastic steps and their effect on the growth of the institute.

* **Prejudicial** means causing harm or disadvantage.
* We use **"to"** before something that is being negatively affected.  
* In this sentence, Meenal's actions will have a negative impact **on** the growth of the institute.

**After** and **for** don't indicate a negative effect, and **at** is not commonly used in this context.