Adding points from another script

I have to scripts, one is on a InputField.

void CompareGuesses(string guess){
	if(guess.ToLower() == gameName.ToLower()){
		text.text = "You Guessed Correctly";
		SceneManager.LoadScene("Level 1");
	} else if(guess != gameName){
		text.text = "Wrong!";
	} else if(guess != gameName){
		text.text = "Wrong!";
	}
}

This is the script if they answer correctly, and I need it to add 1 point to my score on this script.

using UnityEngine;
using System.Collections;
using UnityEngine.SceneManagement;

public class GameStatus : MonoBehaviour {

public int score = 0;
static GameStatus instance;

public static GameStatus GetInstance(){
	return instance;
}

void Start () {
	score = PlayerPrefs.GetInt ("score", 0); 
}

void Update () {

}
void OnDestroy(){
	Debug.Log ("Fail");
	PlayerPrefs.SetInt ("score", score);
	
}
public void AddScore(int s){
	score += s;
}
public void LoadScene(string sceneName){
	SceneManager.LoadScene (sceneName);
}

}

You can just call the function AddScore() when the answer is correct and after that you can update the score variable.

But Before that you should get the reference of that script

ScoreScript object;
 object=GetComponent<ScoreScript>();

if(guess.ToLower() == gameName.ToLower()){
text.text = “You Guessed Correctly”;

here you can call AddScore and pass value that you want to increment

object.Addscore(1);

And in add score function just update the score

public void AddScore(int s)
{
     score += s;
     PlayerPrefs.SetInt("score",score);

}

Note that both the script should be on same gameobject