Question

Which of the following phrases describes the structure of a monocot stem?

contains vascular bundles that are scattered throughout the ground tissue
contains a ring of vascular bundles that surrounds a core of ground tissue
None of the listed answers are correct
contains a core of vascular tissue that is surrounded by a ring of ground tissue
contains several layers of xylem that are surrounded by a ring of phloem
All of the listed answers are correct

please help, don't just show the answer but explain.