ui:inputSelect

<aura:component implements="flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes" access="global" >
    <div class="demo-only slds-grid" style="height: 150px; width: 300px; padding: 2rem;">
      <div class="slds-is-fixed">
          <div style="position: absolute;">
              <ui:inputSelect multiple="true" aura:id="levels" change="{!c.onSelectChange}">
                  <ui:inputSelectOption text="" label="" value="true"/>
                  <ui:inputSelectOption text="Pune" label="Pune"/>
                  <ui:inputSelectOption text="Mumbai" label="Mumbai"/>
                  <ui:inputSelectOption text="Delhi" label="Delhi"/>
                  <ui:inputSelectOption text="Bangalore" label="Bangalore"/>
              </ui:inputSelect>
              <label class="slds-form-element__label">You selecetd</label>
              <ui:inputText aura:id="selectedVal" value=""/>
          </div>
      </div>
    </div>
</aura:component>