The Prashna Upanishad or the Prashnopanishad is one of the earlier, "primary" Upanishads commented upon by Shankara. It is a Mukhya Upanishad, associated with the Atharvaveda. It figures as number 4 in the Muktika canon of 108 Upanishads. Fullscreen mode. Easy and simple to use layout with page animations. Choose from a wide variety of customisable themes.