How do I populate the selected list (right side)?

[TDK1964]

This is my test data

[
    {
        "index": 0,
        "name": "Peters Sloan",
        "selected": "selected" 
    },
    {
        "index": 1,
        "name": "Bailey Hoffman",
        "selected":  "selected"
    },
    {
        "index": 2,
        "name": "Christine Hahn",
        "selected":  "" 
    },
    {
        "index": 3,
        "name": "Blanchard Levy",
        "selected":  "" 
    }
]