<option value="${custList.id}" ><c:out value="${custList.name}"></c:out></option>

<c:when test="${jspMasterObj.datatypeMaster.id == 6}">  //id=6 means drop-down datatype
<c:set var="dropdownList" value="${jspMasterObj.listForDropdown}"></c:set> //list containing drop-down items
<c:set var="dropdownKey" value="${jspMasterObj.dropdownKey}"></c:set>   //id for the corresponding item in the list
<c:set var="dropdownVal" value="${jspMasterObj.dropdownValue}"></c:set> //name for the corresponding item in the list
    <select class="form-control selectpicker" id="testDrop" name="testDrop">
        <option value="0" >--Select Value-- </option>
            <c:forEach var="dropdownListVar" items="${requestScope[dropdownList]}">
                <option value="${dropdownListVar}.${dropdownKey}" ><c:out value="${dropdownListVar}.${dropdownValue}"></c:out></option>
            </c:forEach>
    </select>
</c:when>