Explanation:

Let’s break it down—here’s how the matching works:

- (a) Abuse of discretion: This fits with Lack of power (2). When someone abuses their discretion, it often means they’re using their power in a way they shouldn't, or stepping beyond their legal limits.

- (b) Equality before law: Connects to Rule of Law (1). The principle here is that everyone is treated equally under the law, which is what Rule of Law is all about.

- (c) Delegated legislation: Goes with Ultra-vires (4). If delegated legislation steps outside the bounds of the authority given, it’s “ultra vires”—literally, “beyond the powers.”

- (d) Separation of powers: Pairs with Check and Balance (3). The separation of powers in government is about having different branches keep each other in check so no one gets too powerful.

So, the correct answer is:

2 1 4 3

The right option is: Option 2: 2 1 4 3.

In summary:

- Abuse of discretion — Lack of power

- Equality before law — Rule of Law

- Delegated legislation — Ultra-vires

- Separation of powers — Check and Balance