<apex:page standardController="Contact" >
<apex:form >
<apex:pageBlock title="Edit Contact">
<apex:pageBlockButtons >
<apex:commandButton action="{!save}" value="Save"/>
</apex:pageBlockButtons>
<apex:pageBlockSection columns="1">
<apex:inputField value="{!Contact.FirstName}"/>
<apex:inputField value="{!Contact.LastName}"/>
<apex:inputField value="{!Contact.Email}"/>
<apex:inputField value="{!Contact.Birthdate}"/>
</apex:pageBlockSection>
</apex:pageBlock>
<apex:detail relatedList="false"/ >
</apex:form>
</apex:page>
the above lines are the exact Visualforce Code, despite having selected the option of "Include in Salesforce Mobile & Lightning Experience" my Visualforce page isn't visible in the Lightning App Builder's visualforce Page Name Section on the RHS, it says"no VF pages available". Am i missing something?