Centripetal and centrifugal xylem are the important features of

As compared to the dicot root,monocotyledon root has:

When the protoxylem is located towards the periphery,the arrangement is called:

In monocot roots,which types of vascular bundles are found?

Given below are two statements:
Statement $I:$ Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.
Statement $II:$ Exarch condition is the most common feature of the root system.
In the light of the above statements,choose the correct answer from the options given below:

What is the layer of cells located between the endodermis and the vascular bundle called?