AEM 6.3 coral select to show an emtpy without value

Hi ,

We have classic and touch ui .In classic have select dropdown shows with any value when drop down and when clicking an the select it showing value

How to achieve the same in touch ui

In Touch UI:-

What is the parameter that i need to add to make it like classic. I added emtpyOption but is creating an emtpy space totally

<buttontype

                                                        jcr:primaryType="nt:unstructured"

                                                        sling:resourceType="granite/ui/components/foundation/form/select"

                                                        emptyOption="{Boolean}true"

                                                        fieldLabel="Select the type of button"

                                                        name="./selectbutton">

                                                        <items jcr:primaryType="nt:unstructured">

                                                            <cta

                                                                jcr:primaryType="nt:unstructured"

                                                                text="CTA"

                                                                value="cta"/>

                                                            <hyperlink

                                                                jcr:primaryType="nt:unstructured"

                                                                text="Hyperlink"

                                                                value="hyperlink"/>

                                                        </items>

                                                    </buttontype>

Thanks