Post Meta field-hidden
1 . Field Label : Field Label as well as Field title
2 . Field Type : Field Type List (You have already selected ) . Use it if you need to change field type
3 . Meta Key : Set Unique MetaKey for field (e.g. book_author)
4. Hidden Field Value : You can define the value (e.g number 1,2 etc text: apple,play etc)
5 . Use it for delete field