[React] option checked,selected

 {/*defaultValue 여기에 값을 넣어주면된다 Y OR N */}
 <customUI.SelectBox defaultValue={data.dispYn} onChange={(e) => {handleDispYnValue(e,data)} } name="dispYn" >
                                                <option value="Y">ㅋ</option>
                                                <option value="N">ㅋㅋ</option>
                                            </customUI.SelectBox>