133.

What OOP methodology is shown below:

public class Department
{
    private string departname;

    // Accessor.
    public string GetDepartname()
    {
        return departname;
    }

    // Mutator.
    public void SetDepartname(string a)
    {
        departname=a;
    }
}

Encapsulation is the hiding of the non-essential features