Here the "deleteall" will delete both the answer records and question records, I don't want the questions
records to be deleted. I have tried making the question as null when we set the answer object to be passed for delete
bit still it is deleting the question records as well.How to achieve the above in deleting only the answer (child) records
and not the question(parent) record? Is there any thing we need to do with @Cascade for Question object? Please clarify.