What's the best kind of solid food to be first introduced to 6 months babies?

For 6 - 8 months the following can be given: Pear Applesauce Plum Peach Bananas Zucchini Avocadoes Pumpkin Butternut Squash Brown rice cereal Oatmeal cereal Barley cereal French beans Beetroot (some say 8-10) Broccoli (some say 8-10) Multigrain (some say 8-10) Sweet potatoes Mangoes (some say 8-10) Carrots (some say 8-10) Prunes Papayas