The primary difference between Biryani and Pulao is that pulao is a one pot dish in which all of the ingredients are mixed together and cooked in one pot, while biryani is cooked by layering par-boiled rice...

Multigrain is a term used when a product incorporates more than one grain in the ingredients, but the grains used may not be whole. Whole grain basically means that that whatever grain is used is being used...

Rice is mainly classified on the basis of length of its grain. The three broad categories are Long, Medium and Short grain rice. There are numerous varieties of rice which fall in any of these categories.