which apple pencil works for the ipad 5th generation

iPad5 is not compatible with Apple Pencil - as it lacks the required screen hardware with which the Pencil interacts with the iPad?

Here is the compatibility list for Apple Pencil and iPad:

Apple Pencil (2nd generation)

You can use Apple Pencil (2nd generation) with these iPad models: 

• iPad Pro 12.9-inch (3rd generation) and later
• iPad Pro 11-inch (1st generation) and later

Apple Pencil (1st generation)

You can use Apple Pencil (1st generation) with these iPad models:

• iPad Pro 12.9-inch (1st or 2nd generation)
• iPad Pro 10.5-inch
• iPad Pro 9.7-inch
• iPad Air (3rd generation)
• iPad (7th generation)
• iPad (6th generation)
• iPad mini (5th generation)

Not sure which iPad you have? Identify your iPad model.

Neither pencil works with the 5th generation iPad. This explains which devices the pencils work with.

Apple Pencil compatibility - Apple Support