Question

which of the following is not considered a whole grain?
flour
popcorn
rice
rye

Explanation:

A whole - grain contains the bran, germ, and endosperm. Flour is a powder made by grinding grains and has often had parts of the grain (like the bran and germ) removed in the refining process. Popcorn, rice, and rye can be consumed as whole - grains in their natural or minimally processed forms.

Answer:

flour