Getting an error in a menu driven function

1 
#include <stdio.h>
const int n=3; 

void readmatrix(int arr[n][n]){
  for(int i=0;i<n;i++)
  for(int j=0;j<n;j++)
  scanf("%d",&arr[i][j]);
}

void dispalymatrix(int arr[n][n]){
  for(int i=0;i<n;i++){
  for(int j=0;j<n;j++)
  printf("%d ",arr[i][j]);
  printf("\n");
  }
}

void addmatrix(int a[n][n],int b[n][n],int c[n][n]){
  for(int i=0;i<n;i++){
  for(int j=0;j<n;j++)
  c[i][j]=a[i][j]+b[i][j];
  }
  displaymatrix(c);
}

void mulmatrix(int a[n][n],int b[n][n],int c[n][n]){
  for(int i=0;i<n;i++){
  for(int j=0;j<n;j++){
  c[i][j]=0;
  for(int k=0;k<n;k++)
  c[i][j]+=a[i][k]*b[k][j];
  }
  }
  displaymatrix(c);
}

void transpose(int a[n][n],int c[n][n]){
  for(int i=0;i<n;i++){
  for(int j=0;j<n;j++)
  c[i][j]=a[j][i];
  }
  displaymatrix(c);
}

int main() {
  int a[n][n],b[n][n],c[n][n],op;
  printf("Enter Matrix A (3X3)\n");
  readmatrix(a);
  printf("Enter Matrix B (3X3)\n");
  readmatrix(b);
  printf("Matrix A\n");  
  displaymatrix(a);
  printf("Matrix B\n");  
  displaymatrix(b);
  printf("1.Add\n2.Multiply\n3.Transpose Matrix A\n4.Transpose Matrix B\n");
  printf("Enter the option:");
  scanf("%d",&op);
  switch(op)
  {
    case 1: printf("Addition\n");
            addmatrix(a,b,c);
            break;
  
    case 2: printf("Multiplication\n");
            mulmatrix(a,b,c);
            break;
            
    case 3: printf("Transpose Matrix A\n");
            transpose(a,c);
            break;

    case 4: printf("Transpose Matrix B\n");
            transpose(b,c);
            break;
    
    default: printf("Wrong Choice\n");
  } 
 return 0;
}

This is a menu-driven program for performing matrix addition, multiplication, and
finding the transpose.