How to easily remember the difference between the two bones in the lower arm?

Just remember that the first bone, ULNA, is from the elbow to "pinkie" side of the wrist. And the other bone, RADIUS, is from the elbow to the thumb side of the wrist. So remember, Ulna is to pinkie, Radius is to thumb. This way, you won't have trouble differentiating them. I hope this helped you. 

Think it's rice because in many countries rice is the main food so it can be traditionally served all at once.

Ibelieve the best option is c eat nutritous food