Issue with the Page Layout Save

Friends,

I'm facing the below issue when I try to save a custom SharePoint 2013 page layout, 

I have a custom content type and custom page layout and when i try to save the values through "Edit Properties" I could save the values but when I try to save the content type from page layout through Ribbon"Save" it is redirecting me to "unexpected error occurred " page,

Any help would be appreciated,

ULS Logs below 

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UnexpectedSystem.NullReferenceException: Object reference not set to an instance of an object.    at Microsoft.SharePoint.WebControls.BaseChoiceField.Validate()    
 at System.Web.UI.Page.Validate()     at Microsoft.SharePoint.WebControls.SPPageStateControl.EnsureItemSavedIfEditMode(Boolean forceSave, String overwriteCommandHandler, String discardChangesCommandHandler)     
at Microsoft.SharePoint.Publishing.Internal.WebControls.PublishingPageStateControl.SaveAndRouteIfNecessary(String eventArgument, PublishingPage& currentPage, Boolean saveOnly, Boolean& wasRouted)     
at Microsoft.SharePoint.Publishing.Internal.WebControls.PublishingPageCheckinHandler.RaisePostBackEvent(String eventArgument)     at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)


Getting Error Message for Exception System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.NullReferenceException: Object reference not set to an instance of an object.     at Microsoft.SharePoint.WebControls.BaseChoiceField.Validate()     at System.Web.UI.Page.Validate()     
at Microsoft.SharePoint.WebControls.SPPageStateControl.EnsureItemSavedIfEditMode(Boolean forceSave, String overwriteCommandHandler, String discardChangesCommandHandler)    
at Microsoft.SharePoint.Publishing.Internal.WebControls.PublishingPageStateControl.SaveAndRouteIfNecessary(String eventArgument, PublishingPage& currentPage, Boolean saveOnly, Boolean& wasRouted)     

at Microsoft.SharePoint.Publishing.Internal.WebControls.PublishingPageCheckinHandler.RaisePostBackEvent(String eventArgument)    
 at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)     at System.Web.UI.Page.HandleError(Exception e)   

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Troubleshooting I did,

 1. Title is the only one required field and it have values during save.

 2. All Content Type values are available in the page layout

Sivabalan