Apologies for the dumb question, I'm a bit of a beginner and am having trouble understanding why the following code will not work correctly.

```
#include <stdio.h>
#include <stdlib.h>

int main()
{
    int j = ' ';
    int check = 0;

    printf("\nPlease enter A, B, or C\n");
    j = getch();

    while(check == 0)
    {
        if(j != 'A' || 'B' || 'C')
        {
            printf("\nInvalid entry, please enter either an A, B, or C\n");
            j = getch();
        }
        else
        {
            check = 1;
        }
    }
}

```

All I want this simple program to do is take in either A, B, or C using `getch()` (Yes, I need to use `getch()`) and use my `while` loop to confirm the entry actually is either an A, a B, or a C. However, I run the program, and even when I enter an A, B, or a C, the program tells me my entry is not valid. Can someone help me here and tell me what I'm doing wrong?

I have a feeling this has to do with the fact that it reads in the character as an ASCII integer, but I'm really not sure how to fix this.