Unity Programmatically Link Prefab

Let’s say I have 5 different enemy prefabs. I won’t know until runtime which prefab I want to be spawning.

I know that normally I can make a public GameObject variable that I can link to a script.

What’s the best way to link the prefab programmatically to accomplish this? It doesn’t seem very efficient to have multiple variables for each prefab that I have to write boiler plate code to handle each :).

Here is the easiest way to keep track of the enemies in your scene:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Enemy : MonoBehaviour {
    public static List<Enemy> allEnemies = new List<Enemy>();
	// Use this for initialization
	void Start () {
	// Update is called once per frame
	void Update () {

I would just create a public List<GameObject> and assign them in the editor. Then you could use a loop on the list to write the code you need to handle each prefab.